Britain's Catherine, Duchess of Cambridge (R) , and Prince William, the Duke of Cambridge walk across the parade ground while visiting the Irish Guards during a St Patrick's Day parade in Mons Barracks in Aldershot on March 17, 2014. William, the Duke of Cambridge attended the parade as Colonel of the Regiment and Catherine presented the traditional sprigs of shamrocks to the Officers and Guardsmen of the Regiment. AFP PHOTO/ADRIAN DENNIS        (Photo credit should read ADRIAN DENNIS/AFP/Getty Images)