Thousands of members of the British Armed Forces took part in a parade and flypast at Windsor Castle Saturday as part of celebrations to mark Queen Elizabeth II's 60 years on the throne.
William's cousin and rugby player Mike Tindall will tie the knot in Scotland Saturday
The couple will marry next month in the courtyard of the Palace in Monaco
The couple will join the other 1,900 invited guests at Prince William & Kate Middleton's April 29 nuptials
Due to a new British army title, the prince may wear a scarlet jacket down the aisle