April 21 2016 at 02:07PM

Britain’s oldest and longest-serving monarch, Queen Elizabeth II, celebrated her 90th birthday today. She was born Princess Elizabeth on April 21, 1926, and became queen at 25 upon the death of her father, King George VI, in 1952.

Royal well-wishers cheers outside Windsor Castle during Queen Elizabeth II's 90th birthday celebrations in Windsor, Britain, on April 21. Thousands of people turned out to wish Britain's longest serving monarch a happy birthday. (Andy Rain/EPA)


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