Joffrey Baratheon is played by an Irish actor.
Jack Gleeson ( born 20 May 1992 ) is a former Irish actor , best known for his portrayal of Joffrey Baratheon in the HBO television series Game of Thrones from 2011 to 2014 . Joffrey Baratheon . Joffrey is portrayed by Irish actor Jack Gleeson in the HBO television adaptation .