LONDON, UNITED KINGDOM - MARCH 15:  Catherine, Duchess of Cambridge and Prince Charles, Prince of Wales iron artwork produced on silk during a visit to the Dulwich Picture Gallery on March 15, 2012 in Dulwich, south London, Englad. 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 John Stillwell - WPA Pool/Getty Images)