The Duke and Duchess of Cambridge visit the 1st Battalion Irish Guards at the St. Patrick's Day Parade at Cavalry Barracks, Hounslow, London, UK, on the 17th March 2019. Picture by Gareth Fuller/WPA-Pool. 17 Mar 2019 Pictured: Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: MEGA TheMegaAgency.com +1 888 505 6342