Queen Elizabeth II Accompanied By The Duke Of Edinburgh Holds A Lunch For Sovereign Monarchs

Catherine, Duchess of Cambridge talks to King Simeon of Bulgaria and his wife Queen Margarita during a reception in the Waterloo Chamber, before the Lunch For Sovereign Monarchs at Windsor Castle, on May 18, 2012 in Windsor, England.
(May 17, 2012 - Source: WPA Pool/Getty Images Europe)