British monarch Queen Elizabeth II is celebrating her 91st birthday today. She's the world's longest reigning queen or king and the U.K.'s oldest ever monarch. The Queen had 13 British prime ministers serve during her reign. She has met 12 U.S. presidents and is due to host President Trump for a state visit this year.

Queen Elizabeth came to throne in 1952, following the death of her father King George VI

Read Full Article: Britain's Queen Elizabeth Celebrates Her 91st Birthday

This article was written by a staff member of TheStreet.

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