Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive at the Victoria Barracks on June 25, 2011 in Windsor, England. The Duchess of Cambridge and Duke of Cambridge are at the barracks to present service medals to members of the Irish Guards. (Photo by Chris Jackson/Getty Images)

A lady and her daughter present flowers to Catherine, Duchess of Cambridge as Prince William, Duke of Cambridge looks on at the Victoria Barracks on June 25, 2011 in Windsor, England. (Photo by Chris Jackson/Getty Images)

Catherine, Duchess of Cambridge speaks with soldiers in Victoria Barracks during a medal parade for the 1st Battalion Irish Guards Regiment on June 25, 2011, in Windsor, United Kingdom . (Photo by Carl Court - WPA Pool/Getty Images)

Catherine, Duchess of Cambridge presents medals to members of the Irish Guards at the Victoria Barracks on June 25, 2011 in Windsor, England. (Photo by Chris Jackson/Getty Images)

Catherine, Duchess of Cambridge attends the Irish Guards Medal Parade at the Victoria Barracks on June 25, 2011 in Windsor, England. (Photo by Chris Jackson/Getty Images)

Catherine, Duchess of Cambridge smiles as she is saluted to during the Irish Guards Medal Parade at the Victoria Barracks on June 25, 2011 in Windsor, England. (Photo by Chris Jackson/Getty Images)