Wills had to go back to work
RAF search-and-rescue pilot Wills, 30, returned to Wales, leaving younger brother Harry to represent the royals.
Kate Middleton stepped in to accompany Harry and sat beside him throughout the event at the Olympic Stadium in east London.
Kate, 30, and the younger royals have been spotted at several events throughout the Games and have enjoyed being involved.
They will stay in the hearts and minds of people all over the world for a very long time to come,’ said Harry, 27, in a statement.
I congratulate all the athletes who have competed. They have shown us that there are few boundaries to human endeavour.’
SEE PICTURES Kate Middleton, Prince William and Prince Harry watch cousin Zara at the Olympics