The Prince and Princess of Wales return to Buckingham Palace by carriage after their wedding, 29th July 1981. She wears a wedding dress by David and Elizabeth Emmanuel and the Spencer family tiara. (Photo by Terry Fincher/Princess Diana Archive/Getty Images)
LONDON - JULY 29: (FILE PHOTO) Prince Charles, Prince of Wales and Diana, Princess of Wales leave St. Paul's Cathedral following their wedding July 29, 1981 in London, England. (Photo by Anwar Hussein/Getty Images)
The Prince and Princess of Wales pose for a wedding portrait in Buckingham Palace, London after their marriage ceremony at St. Paul's Cathedral. The Princess is wearing the Spencer family tiara. (Photo by PA Images via Getty Images)
The Princess of Wales, formerly Lady Diana Spencer, waves to the crowds as she leaves St. Paul's Cathedral in London with her husband, the Prince of Wales after their wedding ceremony. The Princess' dress was designed by Elizabeth and David Emanuel. * has a 25ft long detachable train. Her veil of ivory silk tulle, spangled with thousands of tiny hand-embroidered mother-of-pearl sequins, is held in place by the Spencer Family diamond tiara. (Photo by PA Images via Getty Images)
Prince Charles and Diana, Princess of Wales (1961-1997) pictured together on the balcony at Buckingham Palace after their royal wedding ceremony in St Paul's Cathedral, London on 29th July 1981. (Photo by Rolls Press/Popperfoto via Getty Images/Getty Images)
