Kate Middleton paid tribute to Princess Diana at a state dinner on Tuesday night. The Duchess wore one of Diana’s tiaras—the Lover’s Knot—at the event she attended with Prince William. Kate, who has worn this tiara to other royal functions, added pearl earrings that also belonged to the late Princess Di. People reports that the Lover’s Knot tiara is over 100-years-old and belongs to Queen Elizabeth, but originally was made for Queen Mary in 1914. Diana was gifted the tiara when she married Prince Charles and returned the crown to the Queen when the two separated.