Kate Middleton and Prince William kept with tradition on Saturday. <br />Kate wore a festive green coat and shamrocks at a St. Patrick's Day celebration. <br />Her baby bump also made a special appearance. <br />The royals visited the 1st Battalion of the Guards regiment in Hounslow, London. <br />The Duke and Duchess also petted the guards' mascot, a grand Irish wolfhound. <br />The couple's third child is due in April, so she skipped drinking the annual pint of Guinness. <br />
