Its Queen Elizabeth's 90th birthday today!
Crowned as the Queen of United Kingdom and other Commonwealth realms in 1953, Elizabeth holds the distinction of being the longest-reigning British monarch and the longest-reigning queen regnant in world history.
To commemorate the birthday of one of the most famous leaders in the world, here is a gallery of Elizabeth's best captured moments.
The young Princess Elizabeth and Princess Margaret were playing with their pet chameleon on the grounds of Windsor Castle, Berkshire.
Queen Elizabeth II was pictured here with her mother, Queen Elizabeth in 1963.
The Queen attended The State Opening of Parliament in London, England.
Queen Elizabeth and her heir apparent Prince Charles watched the action during the Braemar Highland Games in Braemar, Scotland.
Queen Elizabeth posed for a picture with Prince Charles, Prince George, and Prince William.
Queen Elizabeth II and U.S. President Barack Obama pose in the Music Room of Buckingham Palace ahead of a State Banquet in London, England.
The Queen posed with her dogs at the Windsor Castle.