John Joseph MacGowran (13 October 1918 – 30 January 1973) was an Irish actor. He was known for being one of the foremost stage interpreters of the work of Samuel Beckett and Seán O'Casey. He was also known to film audiences for his roles as Professor Abronsius in The Fearless Vampire Killers (1967), Juniper in How I Won the War (1967), and Burke Dennings in The Exorcist (1973); MacGowran died during production of the latter film. (Via Wikipedia)
