Princess Margaret, Countess of Snowdon, CI, GCVO, GCStJ (Margaret Rose; 21 August 1930 – 9 February 2002) was the younger daughter of King George VI and Queen Elizabeth and the only sibling of Queen Elizabeth II.
Margaret was often viewed as a controversial member of the British royal family. Her divorce in 1978 earned her negative publicity, and she was romantically associated with several men. Her health gradually deteriorated in the final two decades of her life. A heavy smoker for most of her adult life, Margaret had a lung operation in 1985, a bout of pneumonia in 1993, and at least three strokes between 1998 and 2001. She died at King Edward VII's Hospital on 9 February 2002.Princess Margaret, Countess of Snowdon in Wikipedia