Princess Kate Middleton and Prince William looked their best at a state banquet at Windsor Castle. The Princess of Wales, 43, stepped out in a glittering dress and a larger-than-life tiara at a state banquet in honor of German President Frank-Walter Steinmeier's visit to the United Kingdom on Wednesday, December 3. For the event, she looked ethereal in a blue Jenny Packham dress featuring an asymmetrical neckline, all-over sequins, a pleated skirt and a glamorous cape that fell into a delicate train.