Share Tweet Pin Email By Katherine Tinsley 1:21pm PDT, Sep 18, 2025 _ Kate Middleton honored Princess Diana at a state banquet with Donald Trump at Windsor Castle. Keep reading for the details...MORE: Follow Wonderwall on MSN for more top news _ Kate Middleton turned heads in a Phillipa Lepley silk crepe gown, which she paired with a blue sash to represent her role as a Dame Grand Cross of the Royal Victorian Order. She also donned Princess Diana's Lover's Knot Tiara - a favorite of the late royal. _ Before Princess Diana donned the stunning accessory, it belonged to another royal: Queen Mary.