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Princess Margaret (1930 - 2002) travelling to her wedding in the Royal Coach. (Photo by Hulton Archive/Getty Images)

Princess Margaret (1930 - 2002) travelling to her wedding in the Royal Coach.    (Photo by Hulton Archive/Getty Images)

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6th May 1960: Princess Margaret (1930 - 2002) and Antony Armstrong-Jones starting to leave the church, passing through the other members of the Royal family, after their wedding ceremony. (Photo by Hulton Archive/Getty Images)

6th May 1960:  Princess Margaret (1930 - 2002) and Antony Armstrong-Jones starting to leave the church, passing through the other members of the Royal family, after their wedding ceremony.  (Photo by Hulton Archive/Getty Images)