John Bosco Hogan (born March 1949) is an Irish stage, film, and television actor.

He is well known as the character Dr. Michael Ryan on the television programme Ballykissangel.^[1] He appeared in a minor role as convicted felon George Saden in John Boorman's film Zardoz (1974), but his first major film role was as Stephen Dedalus in Joseph Strick's A Portrait of the Artist as a Young Man (1977), a film adaptation of James Joyce's novel of the same name.^[2] His later film credits include roles in The Outsider (1979), Screamtime (1983), In the Name of the Father (1993), Evelyn (2002) and King Arthur (2004).^[3] On television he played Jonathan Harker in the 1977 TV version of Count Dracula with Louis Jourdan; Frederick, Duke of York in Prince Regent in 1979; and Edward Ferrars in the 1981 adaptation of Sense and Sensibility.^[4] He was a senior policeman for several episodes of the television programme, The Chief (1995).^[2]

Hogan appeared in the play A Cry from Heaven by Vincent Woods at the Abbey Theatre in the summer of 2005.^[5] He portrayed St. John Fisher in the 2007 season of The Tudors television programme on the Showtime channel.^[6] He played a cardinal once again in The Borgias (2011), as Cardinal Piccolomini.^[1] Hogan also appears in Season 5 of the television series Vikings (History Channel, 2017) as Lord Abbot at Lindisfarne monastery and in its sequel series Vikings: Valhalla as Aethelred the Unready.^[7] Hogan also appears in an episode of Tales of the Unexpected.

His distinctive voice has him regularly working on voiceovers for both advertising and corporate clients in Ireland.^[8]