evening dress Atria Backless Long Formal Gown with Plunging V-Neck Black / XLarge

Here is a video posted by Kensington Palace showing both engagements from the day, the welcome ceremony and tonight's banquet. A day to remember in Windsor for the State Visit of @POTUS pic.twitter.com/vOWGlh6sOA The Prince and Princess of Wales (@KensingtonRoyal) September 17, 2025 For tonight's state occasion, the Queen chose an embroidered gown by Fiona Clare in royal blue silk marocain, a dense, heavy fabric with a pebbled surface often used for eveningwear

Wispy ruffle details add romantic movement, while an elasticated back waist and concealed back zipper ensure a flattering, comfortable fit

Slim shoulder straps hold the sweetheart neckline open and balanced, while the skirt is cut to a full, floor-length shape where subtle pleating gives the effect of controlled volume

The button placket with a slit at the bottom creates a flattering silhouette, while the adjustable spaghetti straps ensure a customizable fit