Elizabeth II is Queen of the United Kingdom, Canada, Australia, and New Zealand
Elizabeth II (Elizabeth Alexandra Mary; born 21 April 1926) has been Queen since 1952. She became Queen when her father, King George VI, died on 6 February 1952. Since 9 September 2015, Elizabeth II has ruled longer than any other king or queen in the history of the United Kingdom.
Princess Elizabeth married Prince Philip, Duke of Edinburgh on 20 November 1947. The couple have four children. Charles, Prince of Wales and successor to the throne. Princess Anne, Prince Andrew and Prince Edward. The princes and princess often use the name Mountbatten-Windsor. This is their official last name.
Source: Wikipedia