He is best known for his recurring role as the accident-prone Father Larry Duff in TV comedy Father Ted. Born in Ireland, Tony was educated in Wicklow, his parents were Bobby and Margaret Guilfoyle. He started his acting career appearing in EastEnders, The Bill and dinnerladies, while appearing in Last of the Summer Wine, though he is probably better known for appearing in Father Ted as Father Larry Duff. More recently, he has appeared in the TV series Rome, playing the Egyptian eunuch, and Pharoh's aide, Pothinus. He also appeared in BBCs The Virgin Queen as Princess Elizabeth's custodian Sir John Bridges.