LONDON, ENGLAND - MARCH 13:  (L-R) Sophie, Countess of Wessex, Prince Edward, Earl of Wessex, Prince Andrew, Duke of York, Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge chat as they leave St Paul's Cathedral after a Service of Commemoration for troops who were stationed in Afghanistan on March 13, 2015 in London, England.  (Photo by Chris Jackson/Getty Images)