Duchess of Cambridge hands out shamrocks to soldiers 17 March 2013 Last updated at 15:31 The Duke and Duchess of Cambridge have attended a St Patrick's Day parade at a military barracks. Catherine, who is five months pregnant, handed out shamrocks to soldiers from the 1st Battalion Irish Guards. Irish wolfhound Domhnall, who was carrying out his first public engagement as the regiment's mascot, was given the last sprig. The event, at Mons Barracks in Aldershot, Hampshire, dates back to 1901. For the first time Prince William was seen wearing the insignia for his new honorary appointment as Personal Aide-de-Camp to the Queen. The position has few duties but will be seen as a symbol of William's growing role within the Royal Family. The royal couple watched 200 soldiers parade through the square, bringing a splash of colour to the occasion in their full ceremonial uniform of scarlet tunics and bearskins, and led by the Band of the Irish Guards. Domhnall's handler, Drummer David Steed, said he had had a sleepless night beforehand: "Rehearsals were fine up until Friday and then we had a rehearsal with the regimental band which hit the wall badly. Domhnall just decided he wanted to do his own thing, and I was quite nervous of him doing the same today, but thankfully his just played the game and behaved. According to Guardsman Lee Wheeler, the duchess told him that she did not know if she was having a boy or a girl, but said she would like a boy and William would like a girl. The soldier said: "I asked her if she had any names yet and she said no."