After having a beautiful baby with her fiancé, one of our favorite Brits made a triumphant return to the red carpet looking (is it possible?) even more glowy and amazing than before. Giuliana Rancic called her out on the carpet for wearing almost no makeup — but we heard that she used Chanel Vitalumière foundation and St. Tropez Rose Skin Illuminator to further bring out her post-baby beauty. Sporting a fresh face and a minimal, slicked-back hairstyle, Sienna looked stunning in the simplest way possible, and we love her for it.
Photo: Rex/Rex USA