Queen Elizabeth II set to become Britain’s longest reigning monarch — in pictures

Britain’s Queen Elizabeth II with the Duke of York on Shetland pony, Peggy in 1930. The Royal Collection / AP photo

Britain’s Queen Elizabeth II and Princess Margaret, right, as they look in different directions, as they attend the West Norfolk hunt point-to-point races at Sporle, England on April 30, 1955. AP Photo file

Diana, Princess of Wales, left, and Britain’s Queen Elizabeth II as they smile to well-wishers outside Clarence House in London on August 4, 1987. Martin Cleaver / AP photo

Le Méridien Abu Dhabi hotel inauguration with Queen Elizabeth II and His Highness Sheikh Zayed Bin Sultan Al Nahyan, the late president of the UAE in 1979. Courtesy Le Méridien Abu Dhabi

From left: Fatima al Melhi, cultural guide, Queen Elizabeth II, and Reem al Hashemy, Minister of State during her visit at the Sheikh Zayed Grand Mosque at the start of her second state visit to the UAE on November 24, 2010. Philip Cheung / EPA

Britain’s Queen Elizabeth II and Prince Philip, accompanied by the prime minister of the UAE, Sheikh Mohammed Bin Rashid Al Maktoum, right, arrive to visit the Zayed National Museum in Abu Dhabi on November 25, 2010, as part of their visit to the Gulf. Arthur Edwards / AP photo

United Arab Emirates President Sheikh Khalifa Al-Nahyan, centre, is welcomed by Britain’s Queen Elizabeth II and the Duke of Edinburgh (right) at Windsor Castle near London April 30, 2013. Andy Rain / EPA

Madame Tussauds refreshes its Queen Elizabeth II wax figure with a recreation of the longest reigning monarch’s diamond jubilee dress at Madame Tussauds on September 7, 2015 in London, England. The wax figure was updated after Buckingham Palace announced that on September 9, 2015 Queen Elizabeth II would surpass Queen Victoria as the longest reigning monarch. Ben Pruchnie / Getty Images

Britain’s Queen Elizabeth II returning to Buckingham Palace in central London, after addressing Parliament during the official State Opening of Parliament ceremony at Westminster on November 18, 2009. After the world watched Prince William’s wedding to Kate Middleton, the celebrations in 2012 for Queen Elizabeth II’s diamond jubilee should put the icing on an “annus mirabilis” for the British royals. Leon Neal / AFP photo

Britain’s Queen Elizabeth II, third left, and from left, Prince Philip, Camilla the Duchess of Cornwall, Kate the Duchess of Cambridge holding Princess Charlotte, Prince George and Prince William aas they leave after attending the Christening of Britain’s Princess Charlotte at St. Mary Magdalene Church in Sandringham, England on July 5, 2015. Matt Dunham / AP photo

Britain’s Queen Elizabeth II smiles as she awaits the arrival of the President of the United Arab Emirates Sheik Khalifa bin Zayed Al Nahyan in Windsor in England on April 30, 2013. Kirsty Wigglesworth / AP photo

Britain’s Queen Elizabeth II, 89, will become the country’s longest-reigning monarch on September 9, 2015 surpassing her great-great-grandmother Queen Victoria’s record of 63 years and seven months.