Queen Elizabeth II to become Britain's longest-serving monarch

Tomorrow Queen Elizabeth II will have ruled Britain for longer than the 63 years, seven months and two days that her great-great-grandmother Queen Victoria was monarch
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Britain's Princess Elizabeth II, representing her father King George VI, who is ill, inspects the Scots Guards at Windsor Castle, on May 26, 1951. (AFP/Getty Images)
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Queen Elizabeth II and Prince Philip are seen through the window of the royal carriage as they arrive, 02 June 1953 in Trafalgar Square. The Queen was solemnly crowned at Westminster Abbey in London that day. (AFP/Getty Images)
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Queen Elizabeth II, surrounded by the bishop of Durham Lord Michael Ramsay (L) and the bishop of Bath and Wells Lord Harold Bradfield, walks to the altar during her coronation ceremony on June 02, 1953 in Westminster Abbey, London, as her maids of honour carry her train. (AFP/Getty Images)
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Undated picture showing the Royal British couple, Queen Elizabeth II, and her husband Philip, Duke of Edinburgh, with their two children, Charles, Prince of Wales (L) and Princess Anne (R), circa 1951. (AFP/Getty Images)
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Britain's Queen Elizabeth (C), her husband Prince Philip, their children Princess Anne (L) and Prince Charles are gathered for a lunch in 1969 at Windsor Castle, west of London. (AFP/Getty Images)
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Photo dated 29 July 1981 showing European Royal Families who attended the wedding of Prince Charles (C-R) and Lady Diana (C-L) the Princess of Wales. The crowned heads of Norway, Belgium, Denmark, Sweden, Netherlands, Luxembourg, Liechtenstein and Monaco surround the Princely Couple and Great Britain's Royal Family. (AFP/Getty Images)
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British Queen Elizabeth II (C), shielding herself from the sun with an umbrella, Prince Philip, Duke of Edinburgh (3rdL), New Zealand Prime Minister Geoffrey Palmer (3rdR) and Mrs Palmer (R) listen to a speech by Anglican Archbishop Hui Vercoe during the celebrations of New Zealand's 150th anniversary in Waitangi on February 6, 1990. (AFP/Getty Images)
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Queen Elizabeth II attends a service for the Order of the British Empire at St Paul's Cathedral on March 7, 2012 in London, England. (Getty Images)
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Catherine, Duchess of Cambridge and Queen Elizabeth II watch part of a children's sports event while visiting Vernon Park during a Diamond Jubilee visit to Nottingham on June 13, 2012 in Nottingham, England. (Getty Images)