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Britain's Queen Elizabeth II (3L) stands with her husband Britain's Prince Philip, Duke of Edinburgh (3R), her son Britain's Prince Charles, Prince of Wales (2L) and his wife Britain's Camilla, Duchess of Cornwall (L), and her grandson Britain's Prince William, Duke of Cambridge (2R) and his wife Britain's Catherine, Duchess of Cambridge, as they pose photo a photograph ahead of the annual evening reception for members of the Diplomatic Corps at Buckingham Palace, London on December 8, 2016. / AFP / POOL / Dominic Lipinski (Photo credit should read DOMINIC LIPINSKI/AFP/Getty Images)

Britain's Queen Elizabeth II (3L) stands with her husband Britain's Prince Philip, Duke of Edinburgh (3R), her son Britain's Prince Charles, Prince of Wales (2L) and his wife Britain's Camilla, Duchess of Cornwall (L), and her grandson Britain's Prince William, Duke of Cambridge (2R) and his wife Britain's Catherine, Duchess of Cambridge, as they pose photo a photograph ahead of the annual evening reception for members of the Diplomatic Corps at Buckingham Palace, London on December 8, 2016. / AFP / POOL / Dominic Lipinski        (Photo credit should read DOMINIC LIPINSKI/AFP/Getty Images)