Princess Diana (1961 - 1997) at a dinner at the British Embassy, Washington D.C., November 1985. She is wearing a cream lace Murray Arbeid gown and the Queen Mary tiara. (Photo by Terry Fincher/Princess Diana Archive/Getty Images)

Princess Diana (1961 - 1997) at a dinner at the British Embassy, Washington D.C., November 1985. She is wearing a cream lace Murray Arbeid gown and the Queen Mary tiara. (Photo by Terry Fincher/Princess Diana Archive/Getty Images)