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EPSOM, ROYAUME-UNI - CIRCA 1960 : La Princesse Alexandra et son mari Angus Ogilvy assistent a la parade des chevaux avant les courses au Derby d'Epsom, circa 1960 a Epsom, Royaume-Uni. (Photo by Keystone-France\Gamma-Rapho via Getty Images)

EPSOM, ROYAUME-UNI - CIRCA 1960 : La Princesse Alexandra et son mari Angus Ogilvy assistent a la parade des chevaux avant les courses au Derby d'Epsom, circa 1960 a Epsom, Royaume-Uni.  (Photo by Keystone-France\Gamma-Rapho via Getty Images)

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Princess Alexandra (left) with Marina, The Duchess of Kent, leaving the Nepalese Embassy in London on 18th October 1960. (Photo by Ray Bellisario/Popperfoto via Getty Images/Getty Images)

Princess Alexandra (left) with Marina, The Duchess of Kent, leaving the Nepalese Embassy in London on 18th October 1960. (Photo by Ray Bellisario/Popperfoto via Getty Images/Getty Images)

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London, England, 24th April 1963, Princess Alexandra is pictured in her wedding gown prior to her marriage to Angus Ogilvy (Photo by Popperfoto via Getty Images/Getty Images)

London, England, 24th April 1963, Princess Alexandra is pictured in her wedding gown prior to her marriage to Angus Ogilvy  (Photo by Popperfoto via Getty Images/Getty Images)

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Princess Alexandra of Kent, The Honourable Lady Ogilvy pictured holding her newborn daughter Marina Victoria Alexandra Ogilvy alongside her husband Angus Ogilvy (1928-2004) holding their son James Ogilvy in London in 1966. (Photo by Rolls Press/Popperfoto via Getty Images/Getty Images)

Princess Alexandra of Kent, The Honourable Lady Ogilvy pictured holding her newborn daughter Marina Victoria Alexandra Ogilvy alongside her husband Angus Ogilvy (1928-2004) holding their son James Ogilvy in London in 1966. (Photo by Rolls Press/Popperfoto via Getty Images/Getty Images)

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MAIDSTONE, UNITED KINGDOM - MAY 25: Princess Alexandra With Her Husband, The Honourable Angus Ogilvy, Visiting Leeds Castle. (Photo by Tim Graham Photo Library via Getty Images)

MAIDSTONE, UNITED KINGDOM - MAY 25:  Princess Alexandra With Her Husband, The Honourable Angus Ogilvy, Visiting Leeds Castle.  (Photo by Tim Graham Photo Library via Getty Images)