Queen Elizabeth II through the years
Queen Elizabeth II became Britain's longest-reigning monarch on Sept. 9, 2015, surpassing her great-great-grandmother Queen Victoria. Here are key milestones in her life.
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Little Princess Elizabeth, left, is shown in 1927. The picture was made as the baby princess was taken for a ride in the grounds of Windsor Castle, she is seen with her cousin, the honourable Gerald Lascelles, right, son of Princess Royal.