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HOBART, AUSTRALIA - MARCH 30: Diana, Princess of Wales, wearing a red dress designed by Bruce Oldfield, the Spencer Tiara and the Royal Family Order of the Queen and the Prince of Wales feathers diamond necklace, smiles as she attends a reception at the Wrest Point Hotel on March 30, 1983 in Tasmania, Australia. (Photo by Anwar Hussein/Getty Images)

HOBART, AUSTRALIA - MARCH 30: Diana, Princess of Wales, wearing a red dress designed by Bruce Oldfield, the Spencer Tiara and the Royal Family Order of the Queen and the Prince of Wales feathers diamond necklace, smiles as she attends a reception at the Wrest Point Hotel on March 30, 1983 in Tasmania, Australia. (Photo by Anwar Hussein/Getty Images)

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HOBART, AUSTRALIA - MARCH 30: Diana, Princess of Wales, wearing a red dress designed by Bruce Oldfield, the Spencer Tiara and the Royal Family Order of the Queen and the Prince of Wales feathers diamond necklace, attends a reception at the Wrest Point Hotel on March 30, 1983 in Tasmania, Australia. (Photo by Anwar Hussein/Getty Images)

HOBART, AUSTRALIA - MARCH 30: Diana, Princess of Wales, wearing a red dress designed by Bruce Oldfield, the Spencer Tiara and the Royal Family Order of the Queen and the Prince of Wales feathers diamond necklace, attends a reception at the Wrest Point Hotel on March 30, 1983 in Tasmania, Australia. (Photo by Anwar Hussein/Getty Images)

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HOBART, AUSTRALIA - MARCH 30: Prince Charles, Prince of Wales and Diana, Princess of Wales, wearing a red dress designed by Bruce Oldfield, the Spencer Tiara and the Royal Family Order of the Queen and the Prince of Wales feathers diamond necklace, attend a reception at the Wrest Point Hotel on March 30, 1983 in Tasmania, Australia. (Photo by Anwar Hussein/Getty Images)

HOBART, AUSTRALIA - MARCH 30: Prince Charles, Prince of Wales and Diana, Princess of Wales, wearing a red dress designed by Bruce Oldfield, the Spencer Tiara and the Royal Family Order of the Queen and the Prince of Wales feathers diamond necklace, attend a reception at the Wrest Point Hotel on March 30, 1983 in Tasmania, Australia. (Photo by Anwar Hussein/Getty Images)

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HOBART, AUSTRALIA - MARCH 30: Princess Diana Attending A Reception At The Wrest Point Hotel In Hobart, Tasmania, During An Official Tour Of Australia. She Is Wearing The Spencer Tiara And The Royal Family Order Of The Queen And The Prince Of Wales Feathers Diamond Necklace. (Photo by Tim Graham Photo Library via Getty Images)

HOBART, AUSTRALIA - MARCH 30:  Princess Diana Attending A Reception At The Wrest Point Hotel In Hobart, Tasmania, During An Official Tour Of Australia. She Is Wearing The Spencer Tiara And The Royal Family Order Of The Queen And The Prince Of Wales Feathers  Diamond Necklace.  (Photo by Tim Graham Photo Library via Getty Images)