Kate Middleton is once again proving that no one wears a tiara quite like the Princess of Wales. The royal, 43, reigned supreme in one of her most regal looks to date for a formal state banquet alongside husband Prince William at Windsor Castle welcoming President Donald Trump and first lady Melania Trump to the United Kingdom on Wednesday, September 17. Middleton was a vision in a couture silk crepe gown by British designer Phillipa Lepley paired with a hand-embroidered gold Chantilly lace evening coat and earrings that once belonged to the late Queen Elizabeth II. Her outfit was adorned with an elegant blue sash as well as the iconic Royal Family Order of King Charles III, Royal Family Order of Elizabeth II as well as the Grand Cross of the Royal Victorian Order star. Catherine, Princess of Wales. Aaron Chown-WPA Pool/Getty Images The most show-stopping addition was none other than Queen Mary's Lover's Knot Tiara - a glamorous piece she revisited after wearing it for the state visit of French President Emmanuel Macron and his wife, Brigitte Macron, in July. As for William, 43, he looked suave in the Most Noble Order of the Garter Sash with the Lesser George, which was complimented by medals including the Order of the Bath and Gold, Diamond and Platinum Coronation emblems. All the Times Princess Kate Has Worn Princess Diana's Favorite Tiara Donald, 79, and Melania, 55, shook their hands in a pleasant exchange on Wednesday, during which the President reportedly complimented Kate by saying, "You're beautiful, so beautiful," according to Hello! Magazine. Eagle-eyed watchers also noticed earlier today that Middleton notably did not curtsy when she smiled and politely greeted Trump during his state visit - although it's not a hard-and-fast rule. Kate Middleton's Symbolic Style Statement for Royal Garden Party Return "There are no obligatory codes of behavior when meeting The Queen or a member of the royal family, but many people wish to observe the traditional forms," the royal family's website explains. "For men this is a neck bow (from the head only) whilst women do a small curtsy. Other people prefer simply to shake hands in the usual way."