King Joffery Actor Jack Gleeson Blasts Celebrity Worship in Epic RantNeetzan Zimmerman1/16/14 10:22am28330EditPromoteDismissUndismissHideGo to permalink Jack Gleeson is not a king — he just plays one on TV. In reality, the 21-year-old Irish actor best known for his role as King Joffrey Baratheon on HBO's Game of Thrones despises worship, particularly of the celebrity variety.