ALDERSHOT, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge attends a St Patrick's Day parade by the 1st Battalion Irish Guards as she visits Aldershot Barracks on St Patrick's Day on March 17, 2013 in Aldershot, England. (Photo by Ben Pruchnie/Getty Images)
The Duke and Duchess of Cambridge visit the 1st Battalion Irish Guards to attend the St. Patricks Day Parade at Mons Barracks, Aldershot. PRESS ASSOCIATION Photo. Picture date: Sunday March 17, 2013. See PA story ROYAL Cambridge. Photo credit should read: Steve Parsons/PA Wire (Photo by Steve Parsons/PA Images via Getty Images)
ALDERSHOT, UNITED KINGDOM - MARCH 17: Catherine, Duchess of Cambridge attends the Irish Guards' St Patrick's Day Parade at Mons Barracks on March 17, 2013 in Aldershot, England. (Photo by Samir Hussein/WireImage)
ALDERSHOT, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge attends a St Patrick's Day parade by the 1st Battalion Irish Guards as they visit Aldershot Barracks on St Patrick's Day on March 17, 2013 in Aldershot, England. (Photo by Toby Melville - WPA Pool/Getty Images)
ALDERSHOT, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge attends a St Patrick's Day parade on March 17, 2013 in Aldershot, England. (Photo by Danny Martindale/WireImage)
