Princess Diana's Revenge Dress Is Immortalized With a Wax Figure On June 29, 1994, Princess Diana wore what later became known as the Revenge Dress. She attended a Vanity Fair fundraising event at the Serpentine Gallery in London on the same evening Diana, Princess of Wales, attended the Annual Costume Institute Gala, or commonly referred to as the MET Gala, at the Metropolitan Museum of Art in New York City on December 9, 1996, Halter Backless Maxi Dress, Deep V Neck, Long Gown DHgate Princess Diana's Inappropriate Outfit During An Australia Trip Was One Of Her Most Daring Looks In 1994, Princess Diana made an unforgettable impression when she arrived at a dinner hosted at the Serpentine Gallery wearing a striking black dress. Her off the shoulder gown has gone down in history