Ardal O'Hanlon is a comedian and actor, best known for his role as Father Dougal McGuire in the comedy television series Father Ted. His father is Rory O'Hanlon, an Irish politician and doctor.

Ardal O'Hanlon was schooled in Blackrock College in Dublin and graduated from the National Institute for Higher Education, Dublin (now Dublin City University) in Communications Studies in 1987. He started out as a stand-up comedian, and was spotted by Graham Linehan, who was to cast him in Father Ted.

He has also had his own television comedy series, My Hero, in which he plays a superhero juggling the duties of his heroic role with the ordinary day-to-day crises of life in the suburbs. Prior to that he had appeared in the more serious series Big Bad World. He also provided the voice of the lead character in a Christmas television cartoon special entitled Robbie the Reindeer - Hooves of Fire.

Beyond the world of television, O'Hanlon is an accomplished writer, and has written a novel (The Talk of the Town - known in the United States as Knick Knack Paddy Whack) which was published in 1998.