Niall O'Brien Filmography
- Actor (38 credits)
- Situations Vacant (2008) Gerry O'Connell
- Teeth (2007) Joe
- Single-Handed (2007) Dr. Patrick Donnelly
- Secret of the Cave (2006) Uncle Ben
- Bumble's Burden (2005) Da's Voice, voice acting
- Love Is the Drug (2004) James
- Capital Letters (2004)
- Vanity Fair (2004) Mr. Moss
- Conspiracy of Silence (2003) John McLaughlin
- Goldfish Memory (2003) Taxi Driver
- On Home Ground (2001) Tim Daly
- The Emperor's New Clothes (2001) Bosun
- When Brendan Met Trudy (2000) Judge
- St. Patrick: The Irish Legend (2000) Longhaire
- Rat (2000) Man in Bookies
- La leggenda del pianista sull'oceano (1998) Harbor Master
- The Last Bus Home (1997) Jessop's Father
- The Long Way Home (1995) Ray Priest
- Braveheart (1995) English General
- Broken Harvest (1994) Josie McCarthy
- Bella Block (1994) Henry
- Black Beauty (1994) Farmer Thoroughgood
- Ailsa (1994) Counselor
- Class of '61 (1993) James O'Neil (Da)
- The Playboys (1992) Police Superintendant
- King Ralph (1991) Inspector Tommy McGuire
- Night of the Fox (1990) Sean Gallagher
- The Investigation: Inside a Terrorist Bombing (1990) Walker
- Echoes (мини-сериал) (1988) Tom O'Brien
- Brond (1987) Liam Briody
- Half Moon Street (1986) Captain Twilley
- Rawhead Rex (1986)
- Gorky Park (1983) KGB Agent Rurik
- Excalibur (1981) Kay
- Lovespell (1981) Corvenal
- The Outsider (1980) Emmet Donovan
- BBC2 Play of the Week (1977) 2nd man on bus
- Ryan's Daughter (1970) Bernard
