Queen Elizabeth II of Great Britain walks with her family on April 19,1965 at Frogmore, Windsor, England. During a picture session taken to mark her 39th Birthday. Prince Edward, 1, is in Pram with Prince Andrew, 4, holding on. Prince Philip and their two eldest Children, Princess Anne and Prince Charles, the heir apparent, complete the family group. (AP Photo)

She has four children, eight grandchildren and five great-grandchildren.