Prince William & Kate: Yacht Party for Zara Phillips' Wedding!

Prince William and wife Kate board the Royal Yacht Brittania on Friday (July 29) in Edinburgh, Scotland.

The Duke and Duchess of Cambridge, both 29, attended a pre-wedding party for William‘s cousin, Zara Phillips, who’ll be tying the knot with rugby player Mike Tindall on Saturday.

Also attending the festivities: William‘s younger brother, Prince Harry.

Zara, 30, is the eldest granddaughter of Queen Elizabeth and the daughter of Princess Anne.

FYI: Friday marked the 30th anniversary of the day Will‘s parents, Prince Charles and Princess Dianna, wed.

20+ pictures inside of Prince William and Kate at Zara Phillips‘ pre-wedding yacht party…