HOUNSLOW, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge during a visit to the 1st Battalion Irish Guardsmen for the annual Irish Guards St Patrick's Day Parade at Cavalry Barracks on March 17, 2018 in Hounslow, England. (Photo by Andrew Parsons - WPA Pool/Getty Images)
HOUNSLOW, ENGLAND - MARCH 17: Prince William, Duke Of Cambridge, Colonel of the Irish Guards holding a pint of Guinness and Catherine, Duchess of Cambridge talk to soldiers as they attend the annual Irish Guards St Patrick's Day Parade at Cavalry Barracks on March 17, 2018 in Hounslow, England. (Photo by Andrew Parsons - WPA Pool/Getty Images)
