LONDON, UNITED KINGDOM - MARCH 15:  Catherine, Duchess of Cambridge visits the Dulwich Picture Gallery on March 15, 2012 in London, England. The Duchess of Cambridge joined her parents-in-law Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall on a royal visit to the gallery to celebrate their shared love of the arts and see work done by the Prince's Foundation for Children and the Arts. (Photo by Rota/Anwar Hussein Collection/Getty Images)