Fashion Kate Middleton Dazzles in a Red Gown and Tiara at Her First State Banquet By Kelsey Glein Kelsey Glein Twitter Kelsey Glein is a Seattle-based writer and editor who covers all things fashion, beauty, and pop culture. She was previously the Digital Editor of InStyle and is currently a Social Media Manager at a cosmetics company. InStyle's editorial guidelines Updated on October 20, 2015 @ 05:30PM Pin Share Tweet Email Photo: Dominic Lipinski/PA Wire The royal family rolled out the red carpet for the Chinese President and his wife during tonight's state dinner at Buckingham Palace, and the Duchess of Cambridge chose to wear an ensemble that matched. With Prince William by her side in a dapper black tuxedo and white bowtie, the lady in red made a stunning appearance at her first state banquet—and we can bet that her outfit won't soon be forgotten. For the historic occasion, Kate Middleton wowed in a sparkling floor-length custom Jenny Packham gown that featured cap-sleeves and accentuated her slim waist with a satin belt. She wore her hair in a chic updo, and finished off her regal look with a selection of jewelry and the beautifully detailed Lotus Flower Tiara that was borrowed straight from Queen Elizabeth II's personal collection. PHOTOS: Kate Middleton's Most Memorable Outfits Ever Julian Parker/UK Press via Getty Images One thing's certain: the Duchess's look definitely took our breath away.