LONDON, UNITED KINGDOM - AUGUST 21: Picture dated 1956 of British Princess Margaret, Queen Elisabeth's sister, during her 26th birthday. (Photo credit should read STF/AFP/Getty Images)
LONDON, UNITED KINGDOM - AUGUST 21: Picture dated 1956 of British Princess Margaret, Queen Elisabeth's sister, during her 26th birthday. (Photo credit should read STF/AFP/Getty Images)