AceShowbiz -

Prince William has some words for comedian Jack Whitehall after Royal Variety Performance on November 13 in which he called Kate Middleton the "one that got away." Whitehall, who went to the same school with the Duchess of Cambridge, talked about his conversation with Prince William when stopping by "Jonathan Ross Show" airing on Saturday.

"William came over and he was very funny, he was very nice but very passive aggressive [and said] 'Oh, so you were flirting with my missus? Oh no that was very funny!' " Whitehall shared, before adding that the Duchess was his senior. "She was a lot older than me. She was in sixth form - it was never going to happen, I was in a head brace!" he explained.

During his performance at the event, which was also attended by One Direction, Ellie Goulding, Ed Sheeran, Bette Midler and Demi Lovato, Whitehall joked to audience that his mother was disappointed he failed to woo the Duchess when he had a chance. "She'll be doing it tonight, she'll be watching the Royal Variety show and I know what she'll be saying - she'll be like: 'Oh look, there he is. The black sheep of the family, embarrassing himself in front of the one that got away,' " he quipped.

Last week, it was announced that Prince William and his wife would make a visit to the U.S. on December 7-9 to attend some events in New York and Washington D.C. Ahead of the visit, Buckingham Palace issued a reminder in regards to the dress code for press crew who will be covering the events. "Smart attire for men includes the wearing of a jacket and tie, and for women a trouser or skirt suit. Those wearing jeans or trainers will not be admitted and casually dressed members of the media will be turned away," it read.