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The Duchess Of Cambridge Attends the Irish Guards' St Patrick's Day Parade

ALDERSHOT, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge attends The Irish Guards St Patricks Day Parade, at Mons Barracks, where The Duchess presented the traditional sprigs of shamrock, on March 17, 2013 in Aldershot, England. (Photo by Mark Cuthbert/UK Press via Getty Images)

Will and Kate's St. Patrick's Day

The Duke and Duchess of Cambridge marked St Patrick's Day by attending a ceremony in Aldershot on March 17.