So that’s it – Queen Elizabeth II has surpassed her great-great grandmother Victoria as Britain's longest-reigning monarch. As we celebrate the Queen's historic milestone, let's look back at the amazing facts and figures that make up her 68-year reign.
0: The number of passports Her Majesty needs when travelling abroad.
1: The number of times she's allowed cameras into her private life – in 1969's Royal Family.
2: The number of birthdays the Queen has. Her actual birthday is on 21 April, but the official ceremony, Trooping the Colour, takes place on a Saturday in June each year.
4: The number of times Her Majesty has attended Wimbledon.
14: The number of prime ministers during Her Majesty's reign.
25: The age Princess Elizabeth became Queen upon the death of her father, King George VI – on 6 February 1952.
39: The number of monarchs that have preceded Her Majesty since William the Conqueror.
41: Her Majesty's ranking on Forbes' Richest Women In The World 2015 list.
129: The number of portraits Her Majesty has sat for during her reign.
10,000: The number of encrusted pearls on her Norman Hartnell wedding gown.
1939: The year she, Princess Margaret and their governess, Marion Crawford, first took the London Underground.
1953: The year Tony Blair was born, making him the first prime minister to be born during Her Majesty's reign.
2010: The year Her Majesty joined Facebook.
2011: The year Her Majesty paid an official (and historical) visit to Ireland, the first monarch to do so since Irish Independence.