Reverend William O'Malley More at IMDbPro »

Soundtrack:

1. This Christmas (2007) (writer: "Twinkle Twinkle Little Me")
   

Actor:

1. The Exorcist (1973) (as Reverend William O'Malley S.J.) .... Father Dyer
   ... aka The Exorcist 2000 (Australia: cable TV title)
   ... aka The Exorcist: The Version You Haven't Seen Yet (USA: recut version)
   ... aka The Exorcist: The Version You've Never Seen (USA: promotional title)
   ... aka William Peter Blatty's The Exorcist (USA: reissue title)
   

Miscellaneous Crew:

1. The Exorcist (1973) (technical advisor) (as Reverend William O'Malley S.J.)
   ... aka The Exorcist 2000 (Australia: cable TV title)
   ... aka The Exorcist: The Version You Haven't Seen Yet (USA: recut version)
   ... aka The Exorcist: The Version You've Never Seen (USA: promotional title)
   ... aka William Peter Blatty's The Exorcist (USA: reissue title)
   

Self:

• 2000s
• 1990s

1. "E! True Hollywood Story" .... Himself (1 episode, 2004)
       - Curse of the Exorcist (2004) TV episode .... Himself
   
   
2. The Fear of God: 25 Years of 'The Exorcist' (1998) (TV) (as Fr. William O'Malley) .... Himself - 'Fr. Dyer'