Britain's Prince William (R) jokes with his cousin Peter Philips during the Eventing Jumping equestrian event at the London 2012 Olympic Games in Greenwich Park, July 31, 2012. [Photo/Agencies]

Steve Redgrave, a retired British rower who won gold medals at five consecutive Olympic Games, Denise Lewis, who won the gold medal in the heptathlon at the 2000 Sydney Olympics, Prince William and Prince Harry watch the men's gymnastics team final in the North Greenwich Arena during the London 2012 Olympic Games July 30, 2012. [Photo/Agencies]