LONDON - NOVEMBER 04: Princess Diana, Princess of Wales on her way to the State Opening of Parliament with Princess Anne on November 04 1981 in London, England. She is travelling in the Glass Coach used for her wedding. (Photo by Anwar Hussein/Getty Images)

LONDON - NOVEMBER 04:  Princess Diana, Princess of Wales on her way to the State Opening of Parliament with Princess Anne on November 04 1981 in London, England. She is travelling in the Glass Coach used for her wedding. (Photo by Anwar Hussein/Getty Images)