Catherine, Duchess of Cambridge celebrated the last night of her twenties by going to the opening of Steven Spielberg's War Horse in London. For her big night out, she chose a custom lace gown by Temperley London, designed by Alice Temperley. “They’re the most humble, down-to-earth people I’ve ever dressed," the designer told InStyle.com recently of dressing Kate and her sister, Pippa. "They’re completely easy and wonderful to work with, and they look great in the clothes.They know exactly what they like.” And one thing the Duchess definitely likes is a good lace dress, as she's worn a short style by Zara and a navy design by Erdem in the past. For more of her recent memorable outfits, click through the gallery.