The Duke And Duchess Of Cambridge Attend The St Patrick's Day Parade At Mons Barracks, Aldershot [Getty Images]

ALDERSHOT, UNITED KINGDOM - MARCH 17: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge attends the St Patrick's Day Parade at Mons Barracks on March 17, 2014 in Aldershot, England. Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge visited the 1st Battalion Irish Guards to present the traditional sprigs of Shamrocks to the Officers and Guardsmen of the Regiment. (Photo by Max Mumby/Indigo/Getty Images)

Getty Images Entertainment Max Mumby/Indigo