In February 1952, Princess Elizabeth was touring Kenya with her husband Prince Philip, the Duke of Edinburgh when she received the bad news that her father, King George VI of Great Britain, had passed away.
Thus, at the tender age of 25, Elizabeth ascended the throne to become Queen of the United Kingdom, Canada, Australia, New Zealand, South Africa, Pakistan, and Ceylon.
She took the title Queen Elizabeth II although she was not a descendant of Queen Elizabeth I (1533-1603), who was the last Tudor queen. Queen Elizabeth II belongs to the Royal House of Windsor, formerly known as Saxe-Coburg and Gotha.
During the Queen’s reign, there have been 11 U.S. presidents. Queen Elizabeth II has met every one of them except Lyndon B. Johnson. She met Harry Truman before she became queen and Herbert Hoover when he was a former president.
Source : samakal.net