Frank Kelly (b. 1938) is an Irish actor, whose career has spanned radio, TV, theatre, music, writing and films. He has played a wide variety of roles in Irish theatre over many years, and he has toured extensively in the USA and Canada. Despite his varied career, he is perhaps best known for playing Father Jack Hackett in the comedy series Father Ted.

He was brought up in a middle-class Dublin household. He claims he desire to become an actor began when he saw a cartoon in which a clown on a stage looked sadly at things being thrown at him. "It seemed to me like a kind of Calvary, kind of triumph over adversity by perseverance and smiling on."

Frank starred in popular RTÉ children's programme Wanderly Wagon alongside Eugene Lambert and Nora O'Mahoney from 1968-1982, playing a number of different characters and wrting many of the scripts.

His work on Hall's Pictorial Weekly established Kelly as one of Ireland's most recognisable faces, and led to him getting the role of Father Jack.

He has been married to Baibre Neldon since 1964, and they have seven children. He also appeared in the film Rat in 2000, and his first ever role in film or television was as an uncredited prisoner in the classic film The Italian Job (1969). For his role in Father Ted, he is said to have worn contact lenses (to show Father Jack's blank eye), and he said that people wouldn't talk to him if he was in his Father Jack make-up.