Although he was there to talk about his newest business venture, he couldn't help but dish a few tidbits about those royal relatives of his.
He admitted he was really nervous when he gave a reading at Kate and William's wedding back in 2011: "The reading? I felt -- yes, I was absolutely terrified."
James Middleton, Kate Middleton, family
James Middleton dishes about royal relatives William and Kate
LONDON, ENGLAND - SEPTEMBER 12: James Middleton and Pippa Middleton attend an exhibition match of wheelchair rugby at the Invictus Games at Copperbox, Queen Elizabeth Park on September 12, 2014 in London, England. (Photo by Karwai Tang/WireImage)
Britain's Kate the Duchess of Cambridge arrives for an Autumn gala evening dinner and reception in aid of Action on Addiction at L'Anima Restaurant in London, England, Thursday, Oct. 23, 2014. Kate is patron of the charity and will meet charity supporters during a pre-dinner reception. (AP Photo/Tim Ireland)
LONDON, ENGLAND - OCTOBER 23: Pippa and James Middleton arrive at the Chapel Royal in St James's Palace, ahead of the christening of the three month-old Prince George of Cambridge by the Archbishop of Canterbury on October 23, 2013 in London, England. (Photo by John Stillwell - WPA Pool /Getty Images)
Britain's Kate, the Duchess of Cambridge, left, Camilla, the Duchess of Cornwall, centre, and Sophie, the Countess of Wessex listen during the service of remembrance at the Cenotaph in Whitehall, London, Sunday, Nov. 9, 2014. The annual service is to remember those who have lost their lives serving in the Armed Forces. (AP Photo/Tim Ireland)
Britain's Duke of Cambridge Prince William, center, his wife Kate the Duchess of Cambridge and his brother Prince Harry visit a ceramic poppy art installation by ceramic artist Paul Cummins entitled 'Blood Swept Lands and Seas of Red' for its official unveiling in the dry moat of the Tower of London in London, Tuesday, Aug. 5, 2014. Their visit to the work in progress installation, which currently consists of approximately 120,000 ceramic poppies and will finish with 888,246 poppies, was held Tuesday to mark the centenary of World War I. The final ceramic poppy will be placed on Armistice Day on November 11, with each poppy representing a British and Commonwealth military fatality from World War I. (AP Photo/Matt Dunham)
Britain's Duke and Duchess of Cambridge talk with French President Francois Hollande, right, ahead of a ceremony at the Cointe Inter-allied Memorial, Liege, Belgium, commemorating the 100th anniversary of the start of the First World War, Monday Aug. 4, 2014. The ceremony pays homage to the victims of the First World War, both soldiers and civilians, from Belgium and abroad, who lost their lives on Belgian soil.(AP Photo / Francois Lenoir, Pool)
Britain's Prince William and Princess Kate, the Duke and Duchess of Cambridge watch athletics at Hampden Park Stadium during the Commonwealth Games 2014 in Glasgow, Scotland, Tuesday July 29, 2014. (AP Photo/Frank Augstein)
Kate, the Duchess of Cambridge, listens on headphones with Steve Lumby Event manager. during a visit to Bletchley Park, near Milton Keyes, England, Wednesday, June 18, 2014, to mark the completion of the year-long restoration project, which has restored the site to its World War II appearance. During the visit, Kate met with WWII codebreaker veterans who worked at the Government Code and Cypher School during WWII. (AP Photo/Eddie Mulholland, Pool)
Britain's Kate, Duchess of Cambridge takes a tour around Bletchley Park, near Milton Keynes, England, Wednesday, June 18, 2014. The Duchess viewed the restored location, tour the WWII Codebreaking Huts and heard about the achievements of the Codebreakers whose work is said to have helped shorten the World War II by two years. (AP Photo/Lefteris Pitarakis)
Britain's Prince William and Kate the Duchess of Cambridge, attend a ceremony in honor of Britain's WWII veterans, as part of D-Day commemoration, in Arromanches, western France , Friday June 6, 2014. Gone are the screaming shells, seasick soldiers and bloodied waters of 1944. On Friday, a sun-splattered Normandy celebrated peace, with silent salutes, tears and international friendship marking 70 years since the D-Day invasion helped change the course of World War II and modern history. (AP Photo/Thibault Camus)
ANNAPOLIS, MD - JUNE 20: Pippa Middleton is seen with her brother, James Middleton, after finishing the Race Across America 2014 on June 20, 2014 in Annapolis, Maryland. (Photo by Larry French/Getty Images)
Britain's Prince William, second right, and his wife Kate, the Duchess of Cambridge, right, are given a skateboard by the City of Playford Mayor, Glenn Docherty, second left, during a display at a skate park in the suburb of Elizabeth, in Adelaide, Australia, Wednesday, April 23, 2014. 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. (AP Photo/Morne de Klerk, Pool)
Britain's Prince William and his wife, Kate, Duchess of Cambridge, pose for a photo at sunset in Uluru, Australia, Tuesday, April 22, 2014. William and Kate have received a traditional Aboriginal welcome during a visit to the tiny town of Yulara, near the bright red sandstone monolith Uluru, also known as Ayers Rock, in the Australian Outback. (AP Photo/William West, Pool)
LONDON, ENGLAND - APRIL 30: (L-R) Carole, James, Michael and Philippa Middleton depart the Goring Hotel in London on April 30, 2011 in London, England. (Photo by Ian Gavan/GP/Getty Images)
Britain's Prince William and his wife Kate, the Duchess of Cambridge, chat during the Anzac Day parade at the Australian War Memorial in Canberra, Australia, Friday, April 25, 2014. The Duke and Duchess attended the memorial as the last engagement of their three week state visit of New Zealand and Australia with their son Prince George.(AP Photo/Rob Griffith)
Catherine, Duchess Of Cambridge Visits The National Portrait Gallery's Road To 2012: Aiming High Exhibition In London. (Photo by Mark Cuthbert/UK Press via Getty Images)
Catherine, Duchess of Cambridge and her sister Pippa Middleton (L) watch from the Royal Box during the men's singles final match between Britain's Andy Murray and Switzerland's Roger Federer on Centre Court on day 13 of the 2012 Wimbledon Championships tennis tournament at the All England Tennis Club in Wimbledon, southwest London, on July 8, 2012. AFP PHOTO / LEON NEAL RESTRICTED TO EDITORIAL USE (Photo credit should read LEON NEAL/AFP/Getty Images)
Catherine, Duchess Of Cambridge After The Thistle Service At St Giles' Cathedral, Edinburgh, For The Installation Of Prince William As A Knight Of The Thistle. (Photo by Mark Cuthbert/UK Press via Getty Images)
Catherine, Duchess of Cambridge (R) and her sister Pippa Middleton (L) talk in the Royal Box before the men's singles final match between Britain's Andy Murray and Switzerland's Roger Federer on Centre Court on day 13 of the 2012 Wimbledon Championships tennis tournament at the All England Tennis Club in Wimbledon, southwest London, on July 8, 2012. AFP PHOTO / LEON NEAL RESTRICTED TO EDITORIAL USE (Photo credit should read LEON NEAL/AFP/GettyImages)
Kate Middleton, the fiancee to Britain's Prince William, smiles during a Naming Ceremony and Service of Dedication for the Royal National Lifeboat Institution's (RLNI) new Atlantic 85 Lifeboat, the 'Hereford Endeavour' 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/GettyImages)
(Left To Right) Prince Philip The Duke Of Edinburgh, Lady Louise Windsor, Catherine Duchess Of Cambridge, Prince William Duke Of Cambridge, Princess Eugenie, Prince Harry And Princess Beatrice On The Balcony Of Buckingham Palace After The Trooping The Colour Ceremony In London. (Photo by Julian Parker/UK Press via Getty Images)
Hm Queen Elizabeth Ll And Catherine, Duchess Of Cambridge During The Jubilee Visit To Vernon Park In Nottingham. (Photo by Mark Cuthbert/UK Press via Getty Images)
LONDON, ENGLAND - DECEMBER 06: The Duchess of Cambridge, Catherine Middleton and Prince William, Duke of Cambridge leave the King Edward VII hospital where she has been treated for hyperemesis gravidarum, extreme morning sickness at King Edward VII Hospital on December 6, 2012 in London, England. (Photo by Danny Martindale/WireImage)
LONDON, UNITED KINGDOM - DECEMBER 05: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Pippa Middleton and James Middleton leave the King Edward VII Hospital after visiting their pregnant sister Catherine, Duchess of Cambridge who is being treated for acute morning sickness on December 05, 2012 in London, England. (Photo by Indigo/Getty Images)
Pippa (C) and James Middleton, sister and brother of Catherine Middleton, Duchess of Cambridge watch Switzerland's Roger Federer take on Romania's Victor Hanescu in their first round match on day one of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on June 24, 2013. AFP PHOTO / ADRIAN DENNIS - RESTRICTED TO EDITORIAL USE (Photo credit should read ADRIAN DENNIS/AFP/Getty Images)
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He also talked about Kate and William's trusty canine, Lupo. Turns out, the furry companion was a wedding present from James. Middleton explains, "It was my sort of ... my little treat for them was to give them a puppy, and Lupo was their gift."
Although James is most often seen out and about with his sister Pippa, he said he gets to see Kate and his nephew George on a regular basis.
James, who started the Cake Kit Company a few years ago, is once again heading in a sweet direction when it comes to business.
This year he started a company called Boomf, which specializes in edible selfies. Yep, now you can stick your face on a marshmallow. He even holds the esteemed title of "Wonka-In-Chief."