Once a year, the Duchess of Cambridge's fans get to see her in a tiara when Her Royal Highness attends the annual diplomatic reception at Buckingham Palace.
Last night, Catherine, wearing a red Jenny Packham dress we first saw at the Chinese State Dinner in October 2015, joined her husband, Prince William, as well as Prince Charles, the Duchess of Cornwall, the Queen and Prince Philip for the formal event, which is attended by about 1,500 people from 130 countries.
Chinese State Dinner in October 2015:
Prince William, his father and his grandfather all wore breeches with a garter on the lower left leg to represent the Order of the Garter, England's oldest order of chivalry. It should be pointed out that this particular outfit is rarely seen by the public.
Some outlets report that Catherine wore the Cambridge Lover's Knot tiara, but The Court Jeweller points out that the piece is actually Queen Mary's Lover's Knot tiara. Queen Mary had royal jeweler Garrard create the piece as a copy of the Cambridge version, and features pearls dangling from 19 diamond arches, in either 1913 or 1914.
Queen Mary left the piece to her granddaughter, the Queen, who then lent it to Princess Diana.
Catherine also borrowed the Queen's earrings, as well as Her Majesty's wedding bracelet, a gift from Prince Philip.