Two daughters are fathered by George VI.
He was succeeded by his eldest daughter , Elizabeth II.
Moments of sadness for her include the death of her father in 1952 at age 56 ; the assassination of Prince Philip 's uncle Lord Mountbatten in 1979 ; the breakdown of her children 's marriages in 1992 -LRB- her annus horribilis -RRB- ; the death in 1997 of her son 's former wife , Diana , Princess of Wales ; and the deaths of her mother and sister in 2002.
