 | An L.A. Minute (2018) as Ted Gold |
 | Hereditary (2018) as Steve Graham |
 | My Astonishing Self: Gabriel Byrne on George Bernard Shaw (2018) as Narratore/Intervistatore |
 | In the Cloud (2018) as Doc Wolff |
 | Lies We Tell (2018) as Donald |
 | Mad to Be Normal (2017) as Jim |
 | Carrie Pilby (2017) as Mr. Pilby |
 | No Pay, Nudity (2016) as Lawrence Rose |
 | Versus: The Life and Films of Ken Loach (2016) |
 | Nadie quiere la noche (2015) as Bram Trevor |
 | The 33 (2015) as Andre Sougarret |
 | Louder Than Bombs (2015) as Gene |
 | Vampire Academy (2014) as Victor Dashkov |
 | Le temps de l'aventure (2013) as L'homme |
 | All Things To All Men (2013) as Joseph Corso |
 | Le capital (2012) as Dittmar Rigule |
 | John Ford: Dreaming the Quiet Man (2012) as Narrator |
 | I, Anna (2012) as D.C.I. Bernie Reid |
 | A Man's Story (2011) as Himself |
 | Perrier’s Bounty (2009) as Voice of the Grim Reaper (voice) |
 | Leningrad (2009) as Philip Parker |
 | Autumn Hearts: A New Beginning (2007) as Christopher Lewis |
 | Jindabyne (2006) as Stewart |
 | Played (2006) as Eddie |
 | Wah-Wah (2005) as Harry Compton |
 | Assault on Precinct 13 (2005) as Captain Marcus Duvall |
 | P.S. (2004) as Peter Harrington |
 | Vanity Fair (2004) as The Marquess of Steyne |
 | Patrick (2004) as Patrick |
 | The Bridge of San Luis Rey (2004) as Brother Juniper |
 | Shade (2003) as Charlie Miller |
 | Flight from Death: The Quest for Immortality (2003) as Narrator |
 | Spider (2002) as Bill Cleg |
 | Ghost Ship (2002) as Captain Sean Murphy |
 | Horses: The Story of Equus (2002) as Narrator |
 | Pursuing the Suspects (2002) as Himself |
 | Virginia's Run (2002) as Ford Lofton |
 | Emmett's Mark (2002) as Jack Marlow / Stephen Bracken |
 | Canone inverso (2000) as The Violinist |
 | End of Days (1999) as Satan |
 | Stigmata (1999) as Father Andrew Kiernan |
 | Enemy of the State (1998) as Fake Brill |
 | Quest for Camelot (1998) as Lionel (voice) |
 | The Man in the Iron Mask (1998) as D'Artagnan |
 | Polish Wedding (1998) as Bolek |
 | Weapons of Mass Distraction (1997) as Lionel Powers |
 | This Is the Sea (1997) as Rohan |
 | The End of Violence (1997) as Ray Bering |
 | Smilla's Sense of Snow (1997) as The Mechanic |
 | Somebody Is Waiting (1996) as Roger Ellis |
 | The Last of the High Kings (1996) as Jack Griffin |
 | The Brylcreem Boys (1996) as Commandant O'Brien |
 | Mad Dog Time (1996) as Ben London |
 | Dead Man (1995) as Charlie Dickinson |
 | Frankie Starlight (1995) as Jack Kelly |
 | The Usual Suspects (1995) as Dean Keaton |
 | Buffalo Girls (1995) as Teddy Blue |
 | Little Women (1994) as Friedrich Bhaer |
 | Trial by Jury (1994) as Daniel Graham |
 | A Simple Twist of Fate (1994) as John Newland |
 | Prince of Jutland (1994) as Fenge |
 | A Dangerous Woman (1993) as Mackey |
 | Point of No Return (1993) as Bob |
 | Into the West (1992) as Papa Reilly |
 | Cool World (1992) as Jack Deebs |
 | Håkon Håkonsen (1990) as Lt. John Merrick |
 | Haakon Haakonsen (1990) as John Merrick |
 | Miller's Crossing (1990) as Tom Reagan |
 | Diamond Skulls (1989) as Lord Hugo Bruckton |
 | A Soldier's Tale (1988) as Saul |
 | The Courier (1988) as Val |
 | Siesta (1987) as Augustine |
 | Hello Again (1987) as Kevin Scanlon |
 | Lionheart (1987) as Black Prince |
 | Giulia e Giulia (1987) as Paolo |
 | Gothic (1986) as Byron |
 | Defence of the Realm (1986) as Nicholas 'Nick' Mullen |
 | Reflections (1984) as William Masters |
 | The Keep (1983) as Major Kaempffer |
 | Hanna K. (1983) as Josué Herzog |
 | Excalibur (1981) as Uther Pendragon |
 | A World War II Fairytale: The Making of Michael Mann's 'The Keep' as Himself (Archive Footage) |
 | Camelot - Live at the Lincoln Center as King Arthur |
 | Into the Night: Portraits of Life and Death as Himself |
 | Hamlet Revenant |
| | Hereditary Executive Producer |
 | Tent City, U.S.A Executive Producer |
| | The Last of the High Kings Writer |
| | The Brylcreem Boys Producer |
 | In the Name of the Father Executive Producer |
