When will Kate and William have their royal baby?

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When will Kate and William have their royal baby?
BRISBANE, AUSTRALIA - APRIL 19: (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge look on as they visit RAAF Amberley on April 19, 2014 in Brisbane, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Pool/Samir Hussein/WireImage)
LONDON, UNITED KINGDOM - AUGUST 05: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge walk through a poppy field art installation entitled 'Blood Swept Lands and Seas of Red' by artist Paul Cummins, in the moat of the Tower of London, to commemorate the First World War on August 5, 2014 in London, England. By it's completion on Armistice Day 2014 the moat will contain 888,246 ceramic poppies, one for each British and Colonial fatality during World War One. (Photo by Max Mumby/Indigo/Getty Images)
Kate Middleton, fiancee of Britain's Prince WIlliam, meets the public during a visit to Belfast Metro College in Belfast, Northern Ireland, on March 8, 2011. Prince William and his bride-to-be Kate Middleton arrived in Belfast on Tuesday for a one-day visit, under the watchful eye of armed police on the surrounding rooftops. AFP PHOTO/PAUL ELLIS (Photo credit should read PAUL ELLIS/AFP/Getty Images)
The Duke And Duchess Of Cambridge During A Visit To A Inner City Arts Youth Project, In Los Angeles, Usa. (Photo by POOL - Julian Parker/UK Press via Getty Images)
Kate Middleton, fiancee of Britain's Prince William, is pictured following a visit with William to Darwen Aldridge Community Academy in Darwen, north-west England, on April 11, 2011. The couple were at the academy to officially open the centre and also to launch the SkillForce Prince's Award. The SkillForce Prince's Award is to recognise the contribution that young people make to their communities. Prince William will marry Kate Middleton at Westminster Abbey in London, on April 29, 2011. AFP PHOTO / PAUL ELLIS (Photo credit should read PAUL ELLIS/AFP/GettyImages)
The Duchess Of Cambridge Meets The Crowds During Her Visit The National War Memorial In Ottawa, Canada, On The First Day Of Her Visit To The Commonwealth Country. (Photo by POOL - UK Press\UK Press via Getty Images)
Prince William's fiancee Kate Middleton shields her eyes during a visit to the University of St Andrews in Scotland on February 25, 2011. During the visit they viewed the surviving Papal Bull (the university's founding document), unveiled a plaque, and met a selection of the University’s current staff and students to mark the start of the Anniversary. Prince William and Kate Middleton attended the university as students from 2001 to 2005 and began their romance in St Andrews.2011. AFP PHOTO/WPA POOL/DANNY LAWSON (Photo credit should read DANNY LAWSON/AFP/Getty Images)
HARROGATE - JULY 05: (FRANCE OUT) Princess Kate Middleton And Prince William during Stage 1 of the Tour de France on Saturday 05 July, 2014, Harrogate, England. (Photo by James Startt/Agence Zoom/Getty Images)
Prince William and Kate Middleton visited Sydney's Taronga Park Zoo on Easter Sunday 20th April 2014.
A photograph taken in London on Wednesday July 2, 2014, to mark Britain's Prince George's first birthday, shows Prince William (R) and Catherine, Duchess of Cambridge (L) with Prince George during a visit to the Sensational Butterflies exhibition at the Natural History Museum in London. Britain's Prince William and his wife Catherine on Monday thanked well-wishers around the world as they prepared to celebrate their son Prince George's first birthday. AFP PHOTO/John Stillwell/POOL EDITORIAL USE ONLY (Photo credit should read JOHN STILLWELL/AFP/Getty Images)
LONDON, ENGLAND - JULY 02: (EDITORIAL USE ONLY) This photo dated Wednesday July 2, 2014, was taken to mark the first birthday of Prince George and shows the Prince during a visit to the Sensational Butterflies exhibition at the Natural History Museum on July 02, 2014 in London, England. (Photo by John Stillwell - WPA Pool /Getty Images)
CIRENCESTER, UNITED KINGDOM - JUNE 15: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge and son Prince George of Cambridge watch Prince William, Duke of Cambridge & Prince Harry play in the Jerudong Trophy charity polo match at Cirencester Park Polo Club on June 15, 2014 in Cirencester, England. (Photo by Max Mumby/Indigo/Getty Images)
CIRENCESTER, UNITED KINGDOM - JUNE 15: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Prince George of Cambridge walks holding his mother Catherine, Duchess of Cambridge's hand as they watch Prince William, Duke of Cambridge & Prince Harry play in the Jerudong Trophy charity polo match at Cirencester Park Polo Club on June 15, 2014 in Cirencester, England. (Photo by Max Mumby/Indigo/Getty Images)
CANBERRA, AUSTRALIA - APRIL 25: Prince George of Cambridge is seen in the arms of Catherine, Duchess of Cambridge as they depart Fairbairn Defence Base on April 25, 2014 in Canberra, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Danny Martindale/WireImage)
CANBERRA, AUSTRALIA - APRIL 25: Catherine, Duchess of Cambridge holds Prince George of Cambridge as they leave Fairbairne Airbase to head back to the UK after finishing their Royal Visit to Australia on April 25 2014 in Canberra, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Chris Jackson/Getty Images)
Britains Prince William (L) and his wife Catherine, Duchess of Cambridge, share a smile during the ANZAC Day march at the Australian War Memorial in Canberra on April 25, 2014. Britain's Prince William, his wife Kate and their son Prince George were on a three-week tour of New Zealand and Australia. AFP PHOTO / Saeed KHAN (Photo credit should read SAEED KHAN/AFP/Getty Images)
Lynne Cosgrove (L), wife of Governor-General of the Commonwealth of Australia Peter Cosgrove (unseen), and Australian Prime Minister Tony Abbott (2nd L) sees off Britain's Prince William (R), his wife Catherine (2nd R), the Duchess of Cambridge, and their son Prince George at the Defence Establishment Fairbairn in Canberra on April 25, 2014. Britain's Prince William, his wife Kate and their son Prince George were on a three-week tour of New Zealand and Australia. AFP PHOTO/ Saeed KHAN (Photo credit should read SAEED KHAN/AFP/Getty Images)
ADELAIDE, AUSTRALIA - APRIL 23: (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge play on DJ decks at the youth community centre, The Northern Sound System in Elizabeth on April 23, 2014 in Adelaide, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Pool/Samir Hussein/WireImage)
Britain's Prince William (L) and his wife Catherine, the Duchess of Cambridge (R) inspect a snake model made by Aboriginal elders during a visit to Uluru-Kata Tjuta Cultural Centre at Uluru in the Northern Territory on April 22, 2014. Britain's Prince William, his wife Kate and their son Prince George are on a three-week tour of New Zealand and Australia. AFP PHOTO/POOL/William WEST (Photo credit should read WILLIAM WEST/AFP/Getty Images)
AYERS ROCK, AUSTRALIA - APRIL 22: (NO UK SALES FOR 28 DAYS) Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge walk around Ayers Rock on April 22, 2014 in Ayers Rock, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Pool/Samir Hussein/WireImage)
AYERS ROCK, AUSTRALIA - APRIL 22: Catherine, Duchess of Cambridge looks on after walking down Kuniya Walk at the base of Uluru on April 22, 2014 in Ayers Rock, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Scott Barbour/Getty Images)
AYERS ROCK, AUSTRALIA - APRIL 22: Catherine, Duchess of Cambridge talks with Aboriginal women during a visit to a local cultural centre at Uluru on April 22, 2014 in Ayers Rock, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by William West - Pool / Getty Images)
AYERS ROCK, AUSTRALIA - APRIL 22: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge walk around the base of Uluru on April 22, 2014 in Ayers Rock, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Chris Jackson/Getty Images)
AYERS ROCK, AUSTRALIA - APRIL 22: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge visit the Uluru-Kata Tjuta Cultural Centre on April 22, 2014 in Ayers Rock, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Chris Jackson/Getty Images)
SYDNEY, AUSTRALIA - APRIL 20: Prince William, Duke of Cambridge kisses Prince George of Cambridge as they look at a Bilby called George at Taronga Zoo on April 20, 2014 in Sydney, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Chris Jackson/Getty Images)
SYDNEY, AUSTRALIA - APRIL 20: Catherine, Duchess of Cambridge holds Prince George of Cambridge as they visit the Bilby Enclosure at Taronga Zoo on April 20, 2014 in Sydney, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Chris Jackson/Getty Images)
Catherine, the Duchess of Cambridge (L), carries her son Prince George as she walks down the stairs from the plane as they arrive at Defence Establishment Fairbairn in Canberra on April 20, 2014. Britain's William, his wife Kate and their son Prince George are on a three-week tour of New Zealand and Australia. AFP PHOTO / Mark GRAHAM (Photo credit should read MARK GRAHAM/AFP/Getty Images)
SYDNEY, AUSTRALIA - APRIL 20: Catherine, Duchess of Cambridge, arrives at Taronga Zoo on April 20, 2014 in Sydney, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Don Arnold/WireImage)
SYDNEY, AUSTRALIA - APRIL 20: (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge feeds a tree kangaroo as they isit the Bilby Enclosure at Taronga Zoo on April 20, 2014 in Sydney, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Pool/Samir Hussein/WireImage)
SYDNEY, AUSTRALIA - APRIL 20: (NO UK SALES FOR 28 DAYS) Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Prince George of Cambridge visit the Bilby Enclosure at Taronga Zoo on April 20, 2014 in Sydney, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Pool/Samir Hussein/WireImage)
SYDNEY, AUSTRALIA - APRIL 20: Catherine, Duchess of Cambridge picks up a toy bilby Prince George of Cambridge threw on the ground as Prince William, Duke of Cambridge holds Prince George of Cambridge during a visit to the Bilby Enclosure at Taronga Zoo on April 20, 2014 in Sydney, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Chris Jackson/Getty Images)
Catherine, the Duchess of Cambridge (L), and her husband, Britain's Prince William (R), react as their son Prince George bites a small present that was given to him at the enclosure of an Australian animal called a bilby, which was named after the young prince, during a visit to Sydney's Taronga Zoo on April 20, 2014. Britain's Prince William, his wife Kate and their son Prince George are on a three-week tour of New Zealand and Australia. AFP PHOTO / POOL / David Gray (Photo credit should read DAVID GRAY/AFP/Getty Images)
Catherine, the Duchess of Cambridge (L), and her husband, Britain's Prince William (R), watch as their son Prince George reacts after they looked at an Australian animal called a bilby, which was named after the young prince, during a visit to Sydney's Taronga Zoo on April 20, 2014. Britain's Prince William, his wife Kate and their son Prince George are on a three-week tour of New Zealand and Australia. AFP PHOTO / POOL / David Gray (Photo credit should read DAVID GRAY/AFP/Getty Images)
SYDNEY, AUSTRALIA - APRIL 20: Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge meet a Koala at Taronga Zoo on April 20, 2014 in Sydney, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Samir Hussein/WireImage)
SYDNEY, AUSTRALIA - APRIL 20: Prince William, Duke of Cambridge presents Catherine, Duchess of Cambridge with a flower in the tree kangaroo enclosure at Taronga Zoo on April 20, 2014 in Sydney, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Chris Jackson/Getty Images)
SYDNEY, AUSTRALIA - APRIL 20: Prince William, Duke of Cambridge holds Prince George of Cambridge as Catherine, Duchess of Cambridge looks on during a visit to the Bilby Enclosure at Taronga Zoo on April 20, 2014 in Sydney, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Chris Jackson/Getty Images)
SYDNEY, AUSTRALIA - APRIL 20: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge watch the Bird Show at Taronga Zoo on April 20, 2014 in Sydney, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Cameron Spencer/Getty Images)
SYDNEY, AUSTRALIA - APRIL 20: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge watch their son Prince George of Cambridge look at an Australian animal called a Bilby, which has been named after the young Prince, during a visit to Sydney's Taronga Zoo on April 20, 2014 in Sydney, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by David Gray - Pool/Getty Images)
SYDNEY, AUSTRALIA - APRIL 20: Catherine, Duchess of Cambridge holds Prince George of Cambridge as they look at a Bilby called George at Taronga Zoo on April 20, 2014 in Sydney, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Chris Jackson/Getty Images)
SYDNEY, AUSTRALIA - APRIL 20: Catherine, Duchess of Cambridge leaves St Andrew's Cathedral following a Easter Sunday Service on April 20, 2014 in Sydney, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Samir Hussein/WireImage)
BRISBANE, AUSTRALIA - APRIL 19: (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge meets with families of service personnel at the Royal Australian Airforce Base at Amberley on April 19, 2014 in Brisbane, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Pool/Samir Hussein/WireImage)
BRISBANE, AUSTRALIA - APRIL 19: (Editors note: A digital filter has been used for this image.) Catherine, Duchess of Cambridge shakes hands with a well wisher on April 19, 2014 in Brisbane, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Bradley Kanaris/Getty Images)
SYDNEY, AUSTRALIA - APRIL 18: Catherine, Duchess of Cambridge walks along the waters edge at Manly Beach on April 18, 2014 in Sydney, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Don Arnold/WireImage)
SYDNEY, AUSTRALIA - APRIL 18: (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge pose with a surfboard they were given as they attend a lifesaving event on Manley Beach on April 18, 2014 in Sydney, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Pool/Samir Hussein/WireImage)
SYDNEY, AUSTRALIA - APRIL 18: Catherine, Duchess of Cambridge sings with patients of Bear Cottage on April 18, 2014 in Sydney, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Brendon Thorne/Getty Images)
KATOOMBA, AUSTRALIA - APRIL 17: (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge pose at Echo Point in the Blue Moutains on April 17, 2014 in Katoomba, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Pool/Samir Hussein/WireImage)
SYDNEY, NEW ZEALAND - APRIL 16: Prince William, Duke of Cambridge, Prince George of Cambridge and Catherine, Duchess of Cambridge arrive at Sydney Airport on a Australian Airforce 737 aircraft on April 16, 2014 in Sydney, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Danny Martindale/WireImage)
SYDNEY, AUSTRALIA - APRIL 16: (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge pose in front of Sydney Harbour Bridge as they visit the Sydney Opera House on April 16, 2014 in Sydney, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Pool/Samir Hussein/WireImage)
SYDNEY, AUSTRALIA - APRIL 16: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge hold cricket bats presented to them in front of the Cricket World Cup during a reception at the Sydney Opera House on April 16, 2014 in Sydney, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Jason Reed - Pool /Getty Images)
WELLINGTON, NEW ZEALAND - APRIL 16: Prince William, Duke of Cambridge and Prince George of Cambridge look on before boarding a Royal Australian Air Force plane for their flight to Australia at Wellington Airport's military terminal April 16, 2014 in Wellington, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Hagen Hopkins/Getty Images)
Britain's Prince William (C) and his wife Catherine (L), the Duchess of Cambridge, visit the Royal New Zealand Police College in Wellington on the final day of their New Zealand visit on April 16, 2014. William, Kate and their son Prince George are on a three-week tour of New Zealand and Australia. AFP PHOTO / MARK MITCHELL /POOL (Photo credit should read MARK MITCHELL/AFP/Getty Images)
WELLINGTON, NEW ZEALAND - APRIL 16: Catherine, Duchess of Cambridge, Prince William, Duke of Cambridge and Prince George of Cambridge depart Wellington Airport on April 16, 2014 in Wellington, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Danny Martindale/WireImage)
CHRISTCHURCH, NEW ZEALAND - APRIL 14: Catherine, Duchess of Cambridge is greeted with a hongi as she visits Christchurch City Council Buildings on April 14, 2014 in Christchurch, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Samir Hussein/WireImage)
CHRISTCHURCH, NEW ZEALAND - APRIL 14: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge place roses at a Memorial Wall after a lunch a hosted by Canterbury Employers' Chamber of Commerce at Wigram Air Force Museum on April 14, 2014 in Christchurch, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Danny Martindale/WireImage)
CHRISTCHURCH, NEW ZEALAND - APRIL 14: Prince William, Duke of Cambridge is seen batting in a cricket game during a 2015 Cricket World Cup event at Latimer Squareon April 14, 2014 in Christchurch, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Danny Martindale/WireImage)
Catherine, the Duchess of Cambridge, plays a game of cricket during a visit to Latimer Square in Christchurch on April 14, 2014. Prince William, his wife Kate and their son Prince George are on a three-week tour of New Zealand and Australia. AFP PHOTO / MARTY MELVILLE (Photo credit should read Marty Melville/AFP/Getty Images)
DUNEDIN, NEW ZEALAND - APRIL 13: Catherine, Duchess of Cambridge talks to a young fan at the official greeting at Dunedin International Airport on April 13, 2014 in Dunedin, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Rob Jefferies/Getty Images)
QUEENSTOWN, NEW ZEALAND - APRIL 13: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge on the Shotover Jet on April 13, 2014 in Queenstown, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Rob Jefferies/Getty Images)
QUEENSTOWN, NEW ZEALAND - APRIL 13: (NO UK SALES FOR 28 DAYS) Catherine Duchess of Cambridge and Prince William, Duke of Cambridge sample red wine as the visit Otago Wines at Amisfield winery on April 13, 2014 in Queenstown, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Pool/Samir Hussein/WireImage)
DUNEDIN, NEW ZEALAND - APRIL 13: (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge is greeted with a hongi by a girl as she arrives at Dunedin Airport on April 13, 2014 in Dunedin, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Pool/Samir Hussein/WireImage)
DUNEDIN, DUNEDIN - APRIL 13: (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge meets well wishers as she visits Cathedral Church at St Paul on April 13, 2014 in Dunedin, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Pool/Samir Hussein/WireImage)
QUEENSTOWN, NEW ZEALAND - APRIL 13: Catherine, Duchess of Cambridge stumbles as she walks through the vineyard with Prince William, Duke of Cambridge visit the Amisfield Winery on April 13, 2014 in Queenstown, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Arthur Edwards - Pool/Getty Images)
DUNEDIN, NEW ZEALAND - APRIL 13: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge watch 'Rippa Rugby' in the Forstyth Barr Stadium on day 7 of a Royal Tour to New Zealand on April 13, 2014 in Dunedin, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Anthony Devlin - Pool/Getty Images)
Catherine, the Duchess of Cambridge (C), talks to students from Arrowtown School after taking a boat ride on the 'Shotover Jet' in the New Zealand city of Queenstown on April 13, 2014. Britain's Prince William, his wife Kate and their son Prince George are on a three-week tour of New Zealand and Australia. AFP PHOTO / POOL / Mark Mitchell (Photo credit should read MARK MITCHELL/AFP/Getty Images)
Britain's Prince William (L) and his wife Catherine, the Duchess of Cambridge (R), take a boat ride on the 'Shotover Jet' in the New Zealand city of Queenstown on April 13, 2014. Britain's Prince William, his wife Kate and their son Prince George are on a three-week tour of New Zealand and Australia. AFP PHOTO / POOL / Mark Mitchell (Photo credit should read MARK MITCHELL/AFP/Getty Images)
QUEENSTOWN, NEW ZEALAND - APRIL 13: Catherine Duchess of Cambridge meets a local girl Maggie Langford on a visit to the Shotover Jet on the Shotover River on April 13, 2014 in Queenstown, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Danny Martindale/WireImage)
DUNEDIN, NEW ZEALAND - APRIL 13: Catherine, Duchess of Cambridge watches a Rippa Rugby tournament at Forsyth Barr Stadium on April 13, 2014 in Dunedin, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Danny Martindale/WireImage)
DUNEDIN, NEW ZEALAND - APRIL 13: (L-R) Catherine, Duchess of Cambridge, Prince William, Duke of Cambridge and All Black player Ritchie McCaw watch 'Rippa Rugby' in the Forstyth Barr Stadium on day 7 of a Royal Tour to New Zealand on April 13, 2014 in Dunedin, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Chris Jackson/Getty Images)
HAMILTON, NEW ZEALAND - APRIL 12: (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge place a flower on the War Memorial as she visits the Cambridge Town Hall on April 12, 2014 in Hamilton, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Pool/Samir Hussein/WireImage)
HAMILTON, NEW ZEALAND - APRIL 12: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend Avantidrome where Their Royal Highnesses formally opened by unveiling a commemorative plaque on April 12, 2014 in Hamilton, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Danny Martindale/WireImage)
HAMILTON, NEW ZEALAND - APRIL 12: Prince William, Duke of Cambridge meets meets a young girl at Pacific Aerospace on April 12, 2014 in Hamilton, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Samir Hussein/WireImage)
Britain's Prince William speaks to a young girl during a walkabout in the Cambridge town centre on April 12, 2014. Prince William, his wife Kate and their son Prince George are on a three-week tour of New Zealand and Australia. AFP PHOTO/POOL/BRUCE MERCER (Photo credit should read Bruce Mercer/AFP/Getty Images)
HAMILTON, NEW ZEALAND - APRIL 12: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge visit the National Cycling Centre of Excellence and Avantidrome on April 12, 2014 in Hamilton, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Samir Hussein/WireImage)
AUCKLAND, NEW ZEALAND - APRIL 11: Catherine, Duchess of Cambridge boards the New Zealand's Americas Cup Team yacht during their visit to Auckland Harbour on April 11, 2014 in Auckland, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Pool/Samir Hussein/WireImage)
AUCKLAND, NEW ZEALAND - APRIL 11: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge pose ahead of going sailing during their visit to Auckland Harbour on April 11, 2014 in Auckland, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Pool/Samir Hussein/WireImage)
AUCKLAND, NEW ZEALAND - APRIL 11: Catherine, Duchess of Cambridge arrives to the Viaduct Basin to sail with Team New Zealand on April 11, 2014 in Auckland, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Fiona Goodall-Pool/Getty Images)
AUCKLAND, NEW ZEALAND - APRIL 11: Catherine, Duchess of Cambridge relaxes after racing in a match race on the Waitemata Harbour on April 11, 2014 in Auckland, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Hannah Peters/Getty Images)
AUCKLAND, NEW ZEALAND - APRIL 11: Prince William, Duke of Cambridge speaks with Lachlan Adam, son of Sergeant Andrew Adam, after arriving at Whenuapai Airbase on April 11, 2014 in Auckland, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Nigel Marple-Pool/Getty Images)
WELLINGTON, NEW ZEALAND - APRIL 10: (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge unveil a portrait of Queen Elizabeth II, painted by New Zealand artist Nick Cuthell at a state reception at Government House on April 10, 2014 in Wellington, New Zealand.on April 10, 2014 in Wellington, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Pool/Samir Hussein/WireImage)
WELLINGTON, NEW ZEALAND - APRIL 10: (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge watches Prince William, Duke of Cambridge sit in a plane as they attend a WW1 commemorative and Flying Day at Omaka Aviation Heritage Centre on April 10, 2014 in Blenheim, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Pool/Samir Hussein/WireImage)
BLENHEIM, NEW ZEALAND - APRIL 10: Catherine, Duchess of Cambridge smiles as she meets the gathered crowds in Seymour Square during Day 4 of a Royal Tour to New Zealand on April 10, 2014 in Blenheim, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Chris Jackson/Getty Images)
BLENHEIM, NZ - APRIL 10: Catherine, Duchess of Cambridge speaks with members of the crowd at a ceremony at the war memorial in Seymour Square on April 10, 2014 in the town of Blenheim, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Phil Noble-Pool/Getty Images)
BLENHEIM, NEW ZEALAND - APRIL 10: Prince William, Duke of Cambridge sits in a WW1 aircraft as Catherine, Duchess of Cambridge looks on during a visit to Omaka Aviation Heritage Centre with Sir Peter Jackson on April 10, 2014 in Blenheim, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Martin Hunter/Getty Images)
WELLINGTON, NZ - APRIL 09: Catherine, Duchess of Cambridge and Prince George of Cambridge attend Plunkett's Parent's Group at Government House on April 9, 2014 in Wellington, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Marty Melville-Pool/Getty Images)
WELLINGTON, NZ - APRIL 09: Catherine, Duchess of Cambridge holds Prince George of Cambridge as they attend Plunkett's Parent's Group at Government House on April 9, 2014 in Wellington, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Marty Melville-Pool/Getty Images)
WELLINGTON, NEW ZEALAND - APRIL 09: Prince George of Cambridge attends a Plunket Play Group at Government House on April 9, 2014 in Wellington, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Pool/Samir Hussein/WireImage)
WELLINGTON, WELLINGTON - APRIL 09: Catherine, Duchess of Cambridge and Prince George of Cambridge attend a Plunket Play Group at Government House on April 9, 2014 in Wellington, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Pool/Samir Hussein/WireImage) (Photo by Samir Hussein/WireImage)
WELLINGTON, NZ - APRIL 09: Catherine, Duchess of Cambridge holds Prince George of Cambridge during a Plunket nurse and parents group visit at Government House on April 9, 2014 in Wellington, New Zealand. Plunket is a national not-for-profit organization that provides care for children and families in New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Marty Melville-Pool/Getty Images)
Britain's Prince George plays with toys during a visit to the Plunket nurse and parents group at Government House in Wellington on April 9, 2014. Plunket is a national not-for-profit organisation that provides care for children and families in New Zealand. Britain's Prince William, Kate and their son Prince George are on a three-week tour of New Zealand and Australia. AFP PHOTO / POOL / MARTY MELVILLE (Photo credit should read Marty Melville/AFP/Getty Images)
Britain's Prince George (R) plays in front of baby Eden Alve (L) during a Plunket nurse and parents group visit at Government House in Wellington on April 9, 2014. Plunket is a national not-for-profit organisation that provides care for children and families in New Zealand. Britain's Prince William, Kate and their son Prince George are on a three-week tour of New Zealand and Australia. AFP PHOTO / POOL / MARTY MELVILLE (Photo credit should read Marty Melville/AFP/Getty Images)
WELLINGTON, NZ - APRIL 09: Catherine, Duchess of Cambridge holds Prince George of Cambridge during a Plunket nurse and parents group visit at Government House on April 9, 2014 in Wellington, New Zealand. Plunket is a national not-for-profit organization that provides care for children and families in New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Marty Melville-Pool/Getty Images)
Catherine (C), the Duchess of Cambridge, holds Prince George (R) during a Plunket nurse and parents group visit at Government House in Wellington on April 9, 2014. Plunket is a national not-for-profit organisation that provides care for children and families in New Zealand. Britain's Prince William, Kate and their son Prince George are on a three-week tour of New Zealand and Australia. AFP PHOTO / POOL / MARTY MELVILLE (Photo credit should read Marty Melville/AFP/Getty Images)
WELLINGTON, WELLINGTON - APRIL 07: Catherine, Duchess of Cambridge and Prince George of Cambridge arrive at Wellington Airport's military terminal for the start of their tour on April 7, 2014 in Wellington, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Samir Hussein/WireImage)
WELLINGTON, NEW ZEALAND - APRIL 07: Catherine, Duchess of Cambridge and Prince George of Cambridge arrive at Wellington Military Terminal on an RNZAF 757 from Sydney on April 7, 2014 in Wellington, New Zealand. The Royal Family have arrived in New Zealand for the first day of a Royal Tour to New Zealand and Australia. Over a period of three weeks the Royal trio will visit 12 Cities in New Zealand and Australia taking part in activities as wide ranging as a yacht race in Auckland Harbour, paying their respects to victims of the 2011 earthquake in Christchurch and visiting Ayres Rock in Australia. (Photo by Chris Jackson/Getty Images)
Britain's Prince William (2nd R) and his wife Catherine (L), carrying baby Prince George, arrive at the international airport in Wellington on April 7, 2014. William, Kate and their son Prince George are on a three-week tour of New Zealand and Australia. AFP PHOTO / MARK TANTRUM (Photo credit should read Mark Tantrum/AFP/Getty Images)
TREADDUR, WALES - FEBRUARY 24: Prince William and Kate Middleton greet the crowds after officially launching the new RNLI's lifeboat 'Hereford Endeavour' at Trearddur Bay, Anglesey on February 24, 2011 in Trearddur, Wales. The newly engaged couple named the Trearddur Bay Lifeboat Station's new RNLI Atlantic 85 type inshore lifeboat the 'Hereford Endeavour'. The vessel was launched during the naming ceremony and the crew demonstrated some of her rescue capabilities. The country is gearing up for the much anticipated wedding of the couple scheduled to take place on April 29, 2011 at Westminster Abbey in London. (Photo by Christopher Furlong/Getty Images)
Kate Middleton, the fiancee to Britain's Prince William, pours champagne over the 'Hereford Endeavour', during a Naming Ceremony and Service of Dedication for the Royal National Lifeboat Institution's (RNLI) new Atlantic 85 Lifeboat at the RNLI Lifeboat Station in Anglesey, near Bangor in Wales on February 24, 2011. Kate Middleton got a taste of life as a working royal Thursday when she and Prince William dedicated a lifeboat in their first official appearance since their engagement. Hundreds of people cheered as the smiling 29-year-old princess-to-be poured a bottle of champagne over the vessel in a dedication service at the lifeboat station Trearddur Bay on Anglesey, northwest Wales. AFP PHOTO/PHIL NOBLE/POOL (Photo credit should read PHIL NOBLE/AFP/Getty Images)
Kate Middleton, (Facing L) fiancee of Britain's Prince William, (R) awards a medal to a young athlete during a visit to Witton Country Park in Darwen, north-west England, on April 11, 2011. The couple also visited Darwen Aldridge Community Academy earlier in the day Monday. Prince William will marry Kate Middleton at Westminster Abbey in London, on April 29, 2011. AFP PHOTO / ANDREW YATES (Photo credit should read ANDREW YATES/AFP/Getty Images)
DARWEN, UNITED, KINGDOM - APRIL 11: Kate Middleton and Prince William walk to meet youths from a local soccer club at Witton County Park, during a visit Darwen Aldridge Community Academy on April 11, 2011 in Darwen, north-west England. The couple were at the academy to officially open the centre and also to launch the SkillForce Prince's Award. The SkillForce Prince's Award is to recognise the contribution that young people make to their communities. Prince William will marry Kate Middleton at Westminster Abbey in London, on April 29, 2011. (Photo by Alastair Grant - WPA Pool/Getty Images)
HARROGATE - JULY 05: (FRANCE OUT) Princess Kate Middleton And Prince William during Stage 1 of the Tour de France on Saturday 05 July, 2014, Harrogate, England. (Photo by James Startt/Agence Zoom/Getty Images)
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April is turning out to be a very special month for Prince William and Kate Middleton.

The Palace revealed Monday morning that the Duke and Duchess of Cambridge, both 32, are expecting their second child in April 2015, which also marks their fourth wedding anniversary. The royal couple married on April 29, 2011.

"Their Royal Highnesses The Duke and Duchess of Cambridge are delighted to confirm they are expecting a baby in April 2015," Kensington Palace announced in a statement.

PHOTOS: Prince George's Most Adorable Moments

The Palace also gave an update on Kate's health. In September, it was revealed that she was suffering from Hyperemisis Gravidarum (extreme morning sickness), just like her first pregnancy with Prince George, now 1.

"The Duchess of Cambridge continues to be affected by Hyperemisis Gravidarum, but her condition is steadily improving," the statement also reads.

Granted she's feeling well enough, Kate's first public appearance since the announcement of her second pregnancy is set for Tuesday, Oct. 21, when she and Prince William are scheduled to help welcome the President of Singapore Tony Tan Keng Yam to London on behalf of Queen Elizabeth. The couple will then travel with President and Mrs. Tan to the Horse Guards Parade, where the visiting dignitary will receive a ceremonial welcome. Kate is also scheduled to attend the Wildlife Photographer of The Year 2014 Awards Ceremony at the Natural History Museum on Tuesday.

NEWS: 8 Reasons Why We Want the Second Royal Baby to Be a Girl

Check out the video below to see everything we know about royal baby number two!

Kate Middleton and Prince William's Child Due in April
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