Bookies drop odds for another royal baby announcement

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The Duke and Duchess of Cambridge make adorable children, and some people are anxiously awaiting a third. Why? They've bet money on it!

Bookmakers have been betting on Will and Kate since their wedding, and they've continued with the births and names of their children.

SEE ALSO: Kate Middleton rocks two different looks on day five of Royal Tour of Canada

After the royal trip to Canada, The Mirror says odds have been cut to just 4 to 6 for a 2017 Kensington Palace announcement that Prince George and Princess Charlotte will have a sibling.

"A 2016 announcement seems unlikely but if the money's to be believed 2017 looks like a certainty," Jessica Bridge of Ladbrokes said.

PHOTOS: Prince George and Princess Charlotte attend party in Canada

30 PHOTOS
Prince George and Princess Charlotte attend party in Canada
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Prince George and Princess Charlotte attend party in Canada
Britain's Prince William (2nd R), Catherine, Duchess of Cambridge (2nd L), Prince George and Princess Charlotte (L) watch as a man inflates balloons at a children's party at Government House in Victoria, British Columbia, Canada, September 29, 2016. REUTERS/Chris Wattie
VICTORIA, BC - SEPTEMBER 29: Prince George of Cambridge plays with bubbles at a children's party for Military families during the Royal Tour of Canada on September 29, 2016 in Carcross, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson - Pool/Getty Images)
VICTORIA, BC - SEPTEMBER 29: Catherine, Duchess of Cambridge and Princess Charlotte of Cambridge at a children's party for Military families during the Royal Tour of Canada on September 29, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson - Pool/Getty Images)
VICTORIA, BC - SEPTEMBER 29: Prince George of Cambridge with Prince William, Duke of Cambridge at a children's party for Military families during the Royal Tour of Canada on September 29, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson - Pool/Getty Images)
VICTORIA, BC - SEPTEMBER 29: Prince George of Cambridge with Prince William, Duke of Cambridge at a children's party for Military families during the Royal Tour of Canada on September 29, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson - Pool/Getty Images)
VICTORIA, BC - SEPTEMBER 29: Princess Charlotte of Cambridge at a children's party for Military families during the Royal Tour of Canada on September 29, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson - Pool/Getty Images)
Britain's Prince William (R), Catherine, Duchess of Cambridge (2nd L), Prince George and Princess Charlotte (R) attend a children's party at Government House in Victoria, British Columbia, Canada, September 29, 2016. REUTERS/Chris Wattie
Britain's Prince George plays with a bubble gun at a children's party at Government House in Victoria, British Columbia, Canada, September 29, 2016. REUTERS/Chris Wattie
Britain's Prince William (2nd L), Catherine, Duchess of Cambridge, Prince George (L) and Princess Charlotte (R) arrive at a children's party at Government House in Victoria, British Columbia, Canada, September 29, 2016. REUTERS/Chris Wattie
Britain's Prince William (2nd L), Catherine, Duchess of Cambridge, Prince George (L) and Princess Charlotte (R) arrive at a children's party at Government House in Victoria, British Columbia, Canada, September 29, 2016. REUTERS/Chris Wattie
Britain's Prince George watches as bubbles are blown at a children's party at Government House in Victoria, British Columbia, Canada, September 29, 2016. REUTERS/Chris Wattie
Britain's Prince William (2nd L), Catherine, Duchess of Cambridge, Prince George (L) and Princess Charlotte (R) arrive at a children's party at Government House in Victoria, British Columbia, Canada, September 29, 2016. REUTERS/Chris Wattie
Britain's Prince George watches as bubbles are blown at a children's party at Government House in Victoria, British Columbia, Canada, September 29, 2016. REUTERS/Chris Wattie
The Duchess of Cambridge with her daughter Princess Charlotte at a children's party for Military families at Government House in Victoria during the Royal Tour of Canada.
The Duchess of Cambridge with her daughter Princess Charlotte at a children's party for Military families at Government House in Victoria during the Royal Tour of Canada.
VICTORIA, BC - SEPTEMBER 29: Catherine, Duchess of Cambridge and Princess Charlotte of Cambridge at a children's party for Military families during the Royal Tour of Canada on September 29, 2016 in Carcross, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson - Pool/Getty Images)
VICTORIA, BC - SEPTEMBER 29: Catherine, Duchess of Cambridge, Princess Charlotte of Cambridge and Prince George of Cambridge, Prince William, Duke of Cambridge at a children's party for Military families during the Royal Tour of Canada on September 29, 2016 in Carcross, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson - Pool/Getty Images)
Britain's Prince William and his wife Kate, the Duke and Duchess of Cambridge, take part in a tea party with their children Prince George and Princess Charlotte at Government House in Victoria, British Columbia, Canada September 29, 2016. REUTERS/Jonathan Hayward/Pool
Britain's Prince William and his wife Kate, the Duke and Duchess of Cambridge, take part in a tea party with their children Prince George and Princess Charlotte at Government House in Victoria, British Columbia, Canada September 29, 2016. REUTERS/Jonathan Hayward/Pool
Britain's Prince George plays with a bubble gun at a children's party at Government House in Victoria, British Columbia, Canada, September 29, 2016. REUTERS/Chris Wattie
Britain's Prince George plays with bubbles as Prince William looks on during a children's tea party at Government House in Victoria, British Columbia, Canada September 29, 2016. REUTERS/Jonathan Hayward/Pool
Britain's Prince William blows up a balloon as he and his wife Kate, the Duchess of Cambridge, take part in a tea party with their children Prince George and Princess Charlotte at Government House in Victoria, British Columbia, Canada September 29, 2016. REUTERS/Jonathan Hayward/Pool
Britain's Prince George plays with bubbles during a children's tea party at Government House in Victoria, British Columbia, Canada September 29, 2016. REUTERS/Jonathan Hayward/Pool
VICTORIA, BC - SEPTEMBER 29: Catherine, Duchess of Cambridge and Prince George of Cambridge at a children's party for Military families during the Royal Tour of Canada on September 29, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson - Pool/Getty Images)
VICTORIA, BC - SEPTEMBER 29: Prince George of Cambridge with Prince William, Duke of Cambridge at a children's party for Military families during the Royal Tour of Canada on September 29, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson - Pool/Getty Images)
VICTORIA, BC - SEPTEMBER 29: Prince George of Cambridge with Prince William, Duke of Cambridge at a children's party for Military families during the Royal Tour of Canada on September 29, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson - Pool/Getty Images)
VICTORIA, BC - SEPTEMBER 29: Catherine, Duchess of Cambridge and Princess Charlotte of Cambridge at a children's party for Military families during the Royal Tour of Canada on September 29, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson - Pool/Getty Images)
VICTORIA, BC - SEPTEMBER 29: Prince George of Cambridge plays with bubbles at a children's party for Military families during the Royal Tour of Canada on September 29, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson - Pool/Getty Images)
VICTORIA, BC - SEPTEMBER 29: (NO UK SALES FOR 28 DAYS) Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George of Cambridge and Princess Charlotte of Cambridge attend a children's party for Military families during the Royal Tour of Canada on September 29, 2016 in Victoria, Canada. (Photo by Pool/Sam Hussein/WireImage)
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For 2018, bookies say there's a 3 to 1 shot that an impending royal birth will be announced. Gamblers were correct when they predicted a princess as the second Cambridge child, but their odds were wrong on her being named Alice.

It has only been 17 months since the birth of Princess Charlotte, but the public seems to already be on bump-watch, hoping for another baby to be in line for the throne.

The Cambridge toddlers were a hit on their tour of Canada, even if Prince George is selective about who he high fives.

RELATED: All of Duchess Kate's Canada tour outfits

33 PHOTOS
All of Duchess Kate's Canada tour outfits
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All of Duchess Kate's Canada tour outfits
Britain's Prince William, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte board a floatplane for their official departure from Canada in Victoria, British Columbia, Canada, October 1, 2016. REUTERS/Chris Wattie
Britain's Catherine, Duchess of Cambridge, steers a tall ship in the harbour in Victoria, British Columbia, Canada, October 1, 2016. REUTERS/Chris Wattie
Britain's Catherine, Duchess of Cambridge, looks over the side of the boat while fishing during a visit to Haida Gwaii in Skidegate, British Columbia, Canada, September 30, 2016. REUTERS/Chris Wattie
The Duchess of Cambridge with her daughter Princess Charlotte at a children's party for Military families at Government House in Victoria during the Royal Tour of Canada.
WHITEHORSE, CANADA - SEPTEMBER 28: (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge sit as stories are read to children at the McBride Museum on September 28, 2016 in Whitehorse, Canada. (Photo by Pool/Sam Hussein/WireImage)
CARCROSS, BC - SEPTEMBER 28: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge visit Carcross during the Royal Tour of Canada on September 28, 2016 in Carcross, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Mark Large - Pool/Getty Images)
KELOWNA, BC - SEPTEMBER 27: Prince William, Duke of Cambridge and Catherine Duchess of Cambridge visit Kelowna University during their Royal Tour of Canada on September 27, 2016 in Kelowna, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna. (Photo by Chris Jackson/Getty Images)
KELOWNA, BC - SEPTEMBER 27: Catherine, Duchess of Cambridge visits Kelowna University during the Royal Tour of Canada on September 27, 2016 in Kelowna, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna. (Photo by Chris Jackson/Getty Images)
KELOWNA, CANADA - SEPTEMBER 27: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge visit the University of British Columbia on September 27, 2016 in Kelowna, Canada. (Photo by Karwai Tang/WireImage)
KELOWNA, BC - SEPTEMBER 27: Catherine, Duchess of Cambridge visits Kelowna University during the Royal Tour of Canada on September 27, 2016 in Kelowna, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna. (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge attends a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge attends a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge attends a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
BELLA BELLA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge walk through the Great Bear Rainforest in Bella Bella, Canada, during the third day of the Royal Tour to Canada on September 26, 2016. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna. (Photo by: Dominic Lipinski - WPA Pool/Getty Images)
BELLA BELLA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge arrives for a visit to first nations Community members for an Official welcome performance on September 25, 2016 in Bella Bella, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna. (Photo by Ian Vogler - WPA Pool/Getty Images)
Prince William (2L) and Catherine (L), the Duke and Duchess of Cambridge walk along with the Premier of British Columbia, Christy Clark, through the Great Bear rainforest in Bella Bella, British Columbia on September 26, 2016. / AFP / POOL / JONATHAN HAYWARD (Photo credit should read JONATHAN HAYWARD/AFP/Getty Images)
BELLA BELLA, CANADA - SEPTEMBER 26: (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend an official welcome and performance from Bella Bella First Nations Community at Wawiska Community Hall on September 26, 2016 in Bella Bella, Canada. (Photo by Pool/Sam Hussein/WireImage)
BELLA BELLA, CANADA - SEPTEMBER 26: (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge attends an official welcome and performance from Bella Bella First Nations Community at Wawiska Community Hall on September 26, 2016 in Bella Bella, Canada. (Photo by Pool/Sam Hussein/WireImage)
BELLA BELLA, CANADA - SEPTEMBER 26: (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend an official welcome and performance from Bella Bella First Nations Community at Wawiska Community Hall on September 26, 2016 in Bella Bella, Canada. (Photo by Pool/Sam Hussein/WireImage)
BELLA BELLA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend an official welcome performance during their visit to first nations Community members on September 25, 2016 in Bella Bella, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna. (Photo by Mark Large - WPA Pool/Getty Images)
VANCOUVER, BC - SEPTEMBER 25: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge arrive by Sea Plane in Vancouver on September 25, 2016 in Vancouver, Canada. (Photo by Samir Hussein/WireImage)
VANCOUVER, BC - SEPTEMBER 25: Catherine, Duchess of Cambridge arrives by Sea Plane in Vancouver on September 25, 2016 in Vancouver, Canada. (Photo by Samir Hussein/WireImage)
VANCOUVER, BC - SEPTEMBER 25: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge arrive by Sea Plane in Vancouver on September 25, 2016 in Vancouver, Canada. (Photo by Samir Hussein/WireImage)
VANCOUVER, BC - SEPTEMBER 25: Catherine, Duchess of Cambridge arrives at the Vancouver Harbour Flight Centre by seaplane to meet dignitaries on September 25, 2016 in Vancouver, Canada. (Photo by Karwai Tang/WireImage)
VICTORIA, BC - SEPTEMBER 24: (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge attends a metting of senior Canadian leaders at Government House on September 24, 2016 in Victoria, Canada. (Photo by Pool/Sam Hussein/WireImage)
VICTORIA, BC - SEPTEMBER 24: Catherine, Duchess of Cambridge, Prince George of Cambridge and Princess Charlotte of Cambridge arrive at 443 Maritime Helicopter Squadron near Victoria international airport on September 24, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna. (Photo by Andrew Chin/Getty Images)
VICTORIA, BC - SEPTEMBER 24: Catherine, Duchess of Cambridge, shoe detail, arrives at 443 Maritime Helicopter Squadron near Victoria international airport on September 24, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna. (Photo by Andrew Chin/Getty Images)
VICTORIA, BC - SEPTEMBER 24: Catherine, Duchess of Cambridge and Princess Charlotte of Cambridge arrive at 443 Maritime Helicopter Squadron near Victoria international airport on September 24, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna. (Photo by Andrew Chin/Getty Images)
VICTORIA, BC - SEPTEMBER 24: Catherine, Duchess of Cambridge attends an official welcome ceremony at the Legislative Assembly of British Columbia at Victoria International Airport on September 24, 2016 in Victoria, Canada. (Photo by Dominic Lipinski-Pool/Getty Images)
VICTORIA, BC - SEPTEMBER 24: Catherine, Duchess of Cambridge, Princess Charlotte and Prince George arrive at Victoria Airport ahead of their Royal Tour of Canada and Yukon on September 24, 2016 in Victoria, Canada. (Photo by Karwai Tang/WireImage)
VICTORIA, BC - SEPTEMBER 24: (NO UK SALES FOR 28 DAYS) Sophie Gregorire, Prime Minister Justin Trudeau, Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge on September 24, 2016 in Victoria, Canada. (Photo by Pool/Sam Hussein/WireImage)
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