On April 21st, 1926,Princess Elizabeth Alexandra Mary was born at her paternal grandfather’s home on 17 Bruton Street in London’s Mayfair neighborhood. When her uncle, King Edward VIII abdicated the throne in 1936, Princess Elizabeth became heir to the British throne.
87 years after her birth, Queen Elizabeth follows Queen Victoria as the longest-reigning monarch in British history. Should she remain on the throne through September 9th, 2015, Queen Elizabeth will surpass her great-great grandmother reign, according to Sky News.
Her Majesty chose to celebrate her birthday “in private” at Windsor Castle today, where the Duchess of Cambridge will attend the National Review of Queen’s Scouts.
Prince Harry, meanwhile will hand out winners’ medals at the London Marathon.