Britain's Princess Beatrice, Princess Eugenie, Prince William and his wife Catherine, Duchess of Cambridge, and Prince Harry (centre row, L-R) applaud during the eventing individual jumping final equestrian event at the London 2012 Olympic Games in Greenwich Park July 31, 2012. [Photo/Agencies]

Britain's Prince William (C) gestures as his cousin Princess Eugenie (L) holds up an umbrella during the eventing individual jumping final equestrian event at the London 2012 Olympic Games in Greenwich Park July 31, 2012. [Photo/Agencies]