Princess Elizabeth and Princess Margaret riding along with their... News Photo1930-1939,Animal,Archival,Birthday,Black And White,British Culture,British Royalty,Child,Domestic Animals,Elizabeth II,Family,Father,Females,George VI of the United Kingdom,Horse,Human Interest,King - Royal Person,Males,People,Princess,Princess Margaret Countess of Snowdon,Queen - Royal Person,Riding,Royal Person,Royalty,Sport,Tree,UK,VerticalPhotographer Collection: Hulton Royals Collection 21st April 1939: Princess Elizabeth and Princess Margaret (1930 - 2002) riding along with their father, King George VI, on the future Queen's 13th birthday. (Photo by Topical Press Agency/Getty Images)