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London, England, 14th November, 1973, HRH Princess Anne and captain Mark Phillips stand together during their wedding service at Westminster Abbey (Photo by Popperfoto via Getty Images/Getty Images)
London, England, 14th November, 1973, HRH Princess Anne and captain Mark Phillips walk past members of the Royal family after their wedding service at Westminster Abbey (Photo by Popperfoto via Getty Images/Getty Images)