King Charles and Queen Camilla rolled out the green carpet for a historic film premiere hosted at Windsor Castle, with British royalty and Hollywood royalty both in attendance. The first-ever glamorous film event hosted at a royal castle spotlighted King Charles’s Amazon Prime documentary, Finding Harmony: A King’s Vision, and Duchess Sophie attended the event looking incredibly harmonious in a satin green dress from Galvan. Duchess Sophie looked incredible in the “figure-skimming silhouette” that was “guaranteed to make you stand out from the crowd.” The emerald hue—along with the fact that Duchess Sophie has worn this frock several times—matched the eco-conscious theme of the evening. (Image credit: Getty Images)The Duchess of Edinburgh chats with Benedict Cumberbatch after the film's premiere. Duchess Sophie, who turned 61-years-old last week, proved there is no age limit on a sexy, slinky satin dress.