Photo: Getty Images1/17HRH the Duchess of Cambridge in Temperley and Dr. Nicholas Cullinan
Photo: Getty Images2/17Samantha Cameron and Sophie Ellis-Bextor
Photo: Getty Images3/17Philip Chung and Alexa Chung in Loewe
Photo: Getty Images4/17Rosamund Pike in Erdem and William & Son jewelry
Photo: Getty Images5/17Erdem Moralioglu and Jaime Perlman
Photo: Getty Images6/17Caroline Issa
Photo: Getty Images7/17Arizona Muse and Laura Bailey
Photo: Getty Images8/17A look inside the National Portrait Gallery
Photo: Getty Images9/17Sadie Coles and Juergen Teller
Photo: Getty Images10/17Sam Doyle, Sai Bennett, and Eric Underwood
Photo: Getty Images11/17Philip Treacy
Photo: Getty Images12/17The program of the evening
Photo: Getty Images13/17Laura Mvula performing
Photo: Getty Images14/17Noor Fares and Alexandre Al Khawam
Photo: Getty Images15/17Ashley Hicks and Katalina Sharkey de Solis
Photo: Getty Images16/17Gabriele Hackworthy
Photo: Getty Images17/17William Asprey and Lucy Asprey