But hopefully he was on his best behavior at the Queen's Christmas lunch at Buckingham Palace today.
Princess Kate arrived with son George in the back of a Range Rover, with brother in law Prince Harry in the front at 12:30 p.m. U.K. time. Princess Charlotte also attended the event.
Prince William, however, was a no-show. He had a "personal, private event" that kept him from attending, People has learned.
Inside, the children were presented to the Queen and little gifts are laid out on chairs along a corridor. They likely need some distractions to keep them entertained–and out of their parents' hair–during lunch. Last year, George clutched a book called Dig, Dig, Digging as he sat alongside nanny Maria Turrion Borrallo.
Today's event is the prelude to the holidays, which the Queen, 89, and the rest of the royal family will celebrate at Sandringham House in Norfolk. On Christmas Day, there will be a smaller gathering for lunch following the morning church service.