Eighteen-year-old Alexandrina Victoria became Queen of England on June 20, 1837. "Drina," as she was known to her family, had a fairly quiet childhood. She kept a diary, so we know a lot about her private life. She was a lively and sometimes mischievous child, and she was well educated, but her mother was overprotective and kept her isolated at Kensington Palace in London. When she was born, she was fifth in line for the throne behind her uncles and her father, and no one expected her to become a monarch. But one by one, her uncles and their heirs died, and by 1830, she was heiress presumptive, next in line for the crown. The dawn hours of June 20, 1837, brought the news her uncle King William the Fourth died, and she was now a queen. Her first demand was that she be given a room of her own and stop having to share with her mother. She remains Britain's longest-ruling monarch, having reigned for 63 years, seven months, and two days.
-- The Writer’s Almanac