GIBRALTAR - AUGUST 01: Prince Charles, Prince of Wales with Diana, Princess of Wales on the Royal Yacht Britannia at the start of their honeymoon cruise, Her outfit is designed by Donald Campbell (Photo by Tim Graham Photo Library via Getty Images)
GIBRALTAR - AUGUST 01: Prince Charles, Prince of Wales with Diana, Princess of Wales on the Royal Yacht Britannia at the start of their honeymoon cruise, Her outfit is designed by Donald Campbell (Photo by Tim Graham Photo Library via Getty Images)