The Princess of Wales last wore the sparkling headpiece, a favorite of the late Princess Diana, to the annual Diplomatic Reception at Buckingham Palace in December 2023.

The royal accessorized with earrings from the late Queen Elizabeth’s collection, and donned Queen Mary’s Lover’s Knot tiara ― marking the first time she’s worn a tiara in nearly two years, as pointed out by People magazine.

In addition to wearing her first tiara in a year and a half, Princess Kate also debuted her Royal Family Order of King Charles III. She pinned the badge featuring a miniature portrait of her father-in-law with a pale blue ribbon on her sash, just above the late Queen Elizabeth 's Royal Family Order.