 | OZI: Voice of the Forest (2024) as Mr. Smiley |
 | Miranda's Victim (2023) as Judge Wren |
 | Mr. Harrigan's Phone (2022) as Mr. Harrigan |
 | Moonfall (2022) as Holdenfield |
 | JFK Revisited: Through the Looking Glass (2021) as Self - Narrator (voice) |
 | Alone (2020) as Edward |
 | Citizen Jane, l'Amérique selon Fonda (2020) |
 | The Burnt Orange Heresy (2020) as Jerome Debney |
 | Reach for the Stars (2019) as Self |
 | Ad Astra (2019) as Thomas Pruitt |
 | Physique de la tristesse (2019) as (voice) |
 | Backdraft 2 (2019) as Ronald Bartel |
 | American Hangman (2019) as Judge Straight |
 | Measure of a Man (2018) as Dr. Kahn |
 | The Leisure Seeker (2018) as John Spencer |
 | Basmati Blues (2017) as Gurgon |
 | Milton's Secret (2016) as Grandpa Howard |
 | Point and Shoot (2016) as Man |
 | The Hunger Games: Mockingjay - Part 2 (2015) as President Coriolanus Snow |
 | Forsaken (2015) as Rev. Clayton |
 | Nicolas Roeg: It's About Time... (2015) as Self |
 | The Mockingjay Lives: The Making of the Hunger Games: Mockingjay Part 1 (2015) as Self - President Coriolanus Snow |
 | Pirate's Passage (2015) as Captain Charles Johnson (voice) |
 | The Hunger Games: Mockingjay - Part 1 (2014) as President Coriolanus Snow |
 | The Calling (2014) as Father Price |
 | Surviving the Game: Making The Hunger Games: Catching Fire (2014) as Self - President Coriolanus Snow |
 | The Hunger Games: Catching Fire (2013) as President Coriolanus Snow |
 | Jappeloup (2013) as John Lester |
 | La migliore offerta (2013) as Billy Whistler |
| | The Hunger Games: Letters From The Rose Garden (2012) as Self |
 | The World Is Watching: Making the Hunger Games (2012) as Self - President Coriolanus Snow |
 | Assassin's Bullet (2012) as Ambassador Ashdown |
 | Dawn Rider (2012) as Pop |
 | The Hunger Games (2012) as President Coriolanus Snow |
 | The Man on the Train (2011) as The Professor |
 | Hollywood Invasion (2011) as archive footage |
 | Jock the Hero Dog (2011) as Narrator / Sir Percy Fitzpatrick (voice) |
 | Horrible Bosses (2011) as Jack Pellit |
 | The Eagle (2011) as Aquila |
 | The Mechanic (2011) as Harry McKenna |
 | The Con Artist (2010) as Kranski |
 | Astro Boy (2009) as President Stone (voice) |
 | The Eastmans (2009) as Dr. Charles Eastman |
 | Stonehenge: Decoded (2008) as Narrator (voice) |
 | Fool's Gold (2008) as Nigel Honeycutt |
 | Puffball (2007) as Lars |
 | L'âge des ténèbres (2007) as Donald Sutherland |
 | Trumbo (2007) as Self |
 | Dinosaurs: Giants of Patagonia (2007) as Narrator |
 | Reign Over Me (2007) as Richter Raines |
 | Sleepwalkers (2007) as Businessman Struck by a Taxi |
 | Fierce People (2006) as Ogden C. Osborne |
 | Beerfest (2006) as Johann von Wolfhaus (uncredited) |
 | Land of the Blind (2006) as Thorne |
 | Ask the Dust (2006) as Hellfrick |
 | Fellini dice... (2006) as Self |
 | Operation Dirty Dozen (2006) as Self (uncredited) |
 | Armed and Deadly: The Making of 'The Dirty Dozen' (2006) as Self |
 | Budd Boetticher: A Man Can Do That (2005) as Self |
 | Pride & Prejudice (2005) as Mr. Bennet |
 | Lord of War (2005) as Colonel Oliver Southern (voice) |
 | American Gun (2005) as Carl Wilk |
 | Sir! No Sir! (2005) as Self |
 | An American Haunting (2005) as John Bell |
 | Aurora Borealis (2005) as Ronald Shorter |
 | Cold Mountain (2003) as Reverend Monroe |
 | Path to War (2003) as Clark Clifford |
 | Baltic Storm (2003) as Lou Aldryn |
 | The Italian Job (2003) as John Bridger |
 | Piazza delle cinque lune (2003) as Rosario Sarracino |
 | Fellini: Je suis un grand menteur (2003) as Self - Casanova |
 | The Magic of Fellini (2002) as Self (archive footage) |
 | 大腕 (2001) as Tyler |
 | Uprising (2001) as Adam Czerniaków |
 | Final Fantasy: The Spirits Within (2001) as Dr. Sid (voice) |
 | The Big Heist (2001) as Jimmy Burke |
 | The Autobiography of Malcolm X (2001) as Narrator (voice) |
 | Panic (2000) as Michael |
 | Clint Eastwood: Out of the Shadows (2000) as Self |
 | The Art of War (2000) as Douglas Thomas |
 | Space Cowboys (2000) as Jerry O'Neill |
| | Enlisted: The Story of 'M*A*S*H' (2000) as Self |
 | Virus: Ghost in the Machine (1999) as Self |
 | The Hunley (1999) as Gen. Pierre G.T. Beauregard |
 | Instinct (1999) as Ben Hillard |
 | Behind the Mask (1999) as Dr. Bob Shushan |
 | Virus (1999) as Captain Robert Everton |
 | Free Money (1998) as Judge Rausenberg |
 | Without Limits (1998) as Bill Bowerman |
 | Fallen (1998) as Lt. Stanton |
 | The Assignment (1997) as Jack Shaw / Henry Fields |
 | Shadow Conspiracy (1997) as Jacob Conrad |
 | Natural Enemy (1996) as Ted Robards |
 | Hollow Point (1996) as Garrett Lawton |
 | A Time to Kill (1996) as Lucien Wilbanks |
 | Hearst Castle: Building the Dream (1996) as Narrator |
 | Roger Moore: A Matter of Class (1995) as Self (archive footage) |
 | Outbreak (1995) as General Donald McClintock |
 | Citizen X (1995) as Col. Mikhail Fetisov |
 | Disclosure (1994) as Bob Garvin |
 | The Puppet Masters (1994) as Andrew Nivens |
 | Oldest Living Confederate Widow Tells All (1994) as William Marsden |
 | The Lifeforce Experiment (1994) as Dr. 'Mac' MacLean |
 | La Classe américaine (1993) as Assassin (archive footage) (uncredited) |
 | Six Degrees of Separation (1993) as Flan |
 | Younger and Younger (1993) as Jonathan Younger |
 | Bethune: The Making of a Hero (1993) as Dr. Norman Bethune |
 | Red Hot (1993) as Kirov |
 | Benefit of the Doubt (1993) as Frank |
 | The Poky Little Puppy's First Christmas (1992) as Narrator (voice) |
 | The Railway Station Man (1992) as Roger Hawthorne |
 | 落陽 (1992) as John Williams |
 | Buffy the Vampire Slayer (1992) as Merrick Jamison-Smythe |
 | Shadow of the Wolf (1992) as Henderson |
 | Quicksand: No Escape (1992) as Murdoch |
 | JFK (1991) as X |
 | Cerro Torre: Schrei aus Stein (1991) as Ivan |
 | Backdraft (1991) as Ronald Bartel |
 | Buster's Bedroom (1991) as O'Connor |
 | Eminent Domain (1991) as Josef Borski |
 | Kate Bush: The Sensual World - The Video (1990) as Self (archive footage) |
 | A Dry White Season (1989) as Ben du Toit |
 | Lock Up (1989) as Warden Drumgoole |
 | Lost Angels (1989) as Dr. Charles Loftis |
 | Apprentice to Murder (1988) as John Reese |
 | People of the Forest: The Chimps of Gombe (1988) as Narrator (voice) |
 | The Trouble with Spies (1987) as Appleton Porter |
 | The Rosary Murders (1987) as Father Robert Koesler |
 | Oviri (1986) as Paul Gauguin |
 | Revolution (1985) as Sgt. Maj. Peasy |
 | Heaven Help Us (1985) as Brother Thadeus |
 | Ordeal by Innocence (1984) as Dr. Arthur Calgary |
 | Crackers (1984) as Westlake |
 | The Winter of Our Discontent (1983) as Ethan Hawley |
 | Max Dugan Returns (1983) as Brian Costello |
| | Fellini nel cestino (1983) as Self |
 | Night of 100 Stars (1982) as Self |
 | A War Story (1981) as Narrator (voice) |
 | Threshold (1981) as Dr. Thomas Vrain |
 | Eye of the Needle (1981) as Faber |
 | Gas (1981) as Nick the Noz |
 | Ordinary People (1980) as Calvin Jarrett |
 | Nothing Personal (1980) as Roger Keller |
| | North China Factory (1980) as Narrator (voice) |
 | Bear Island (1979) as Frank Lansing |
 | A Man, a Woman and a Bank (1979) as Reese Halperin |
 | Murder by Decree (1979) as Robert Lees |
 | Invasion of the Body Snatchers (1978) as Matthew Bennell |
 | The First Great Train Robbery (1978) as Robert Agar |
 | Animal House (1978) as Dave Jennings |
 | Der Richter und sein Henker (1978) as Corpse of Lt. Robert Schmied (uncredited) |
 | Les liens de sang (1978) as Carella |
 | The Disappearance (1977) as Jay Mallory |
 | The Kentucky Fried Movie (1977) as The Clumsy Waiter (segment "That's Armageddon") |
 | Bethune (1977) as Dr. Norman Bethune |
 | The Eagle Has Landed (1976) as Liam Devlin |
 | Il Casanova di Federico Fellini (1976) as Giacomo Casanova |
 | Novecento (1976) as Attila Mellanchini |
 | Bertolucci secondo il cinema (1976) as Self |
 | Abicinema (1975) as Self |
 | The Day of the Locust (1975) as Homer Simpson |
 | S*P*Y*S (1974) as Bruland |
 | Alien Thunder (1974) as Sgt. Dan Candy |
 | Les Vilaines manières (1974) as Man walking (uncredited) |
 | Don't Look Now (1973) as John Baxter |
 | Lady Ice (1973) as Andy Hammon |
 | Steelyard Blues (1973) as Jesse Veldini |
 | FTA (1972) as Self |
 | 'Klute' in New York (1971) as Self |
 | Johnny Got His Gun (1971) as Christ |
 | Klute (1971) as John Klute |
 | Little Murders (1971) as Rev. Dupas |
 | Alex in Wonderland (1970) as Alex Morrison |
 | Act of the Heart (1970) as Father Michael Ferrier |
 | Kelly's Heroes (1970) as Sgt. Oddball (Tank Commander) |
 | M*A*S*H (1970) as Hawkeye Pierce |
 | Start the Revolution Without Me (1970) as Charles / Pierre |
 | The Sunshine Patriot (1968) as Benedeck |
 | Joanna (1968) as Lord Peter Sanderson |
 | The Split (1968) as Dave Negli |
 | Oedipus the King (1968) as Chorus Leader |
 | Interlude (1968) as Lawrence |
 | Sebastian (1968) as Ackerman |
 | Billion Dollar Brain (1967) as Scientist at Computer |
 | The Shuttered Room (1967) as Zebulon (voice) |
 | The Dirty Dozen (1967) as Vernon Pinkley |
 | Promise Her Anything (1966) as Autograph Seeking Father (uncredited) |
 | The Bedford Incident (1965) as Hospitalman Nerney - Sick Bay |
 | Fanatic (1965) as Joseph |
 | Dr. Terror's House of Horrors (1965) as Bob Carroll |
 | Il castello dei morti vivi (1964) as Sgt. Paul / The Witch / The Old Man |
 | Hamlet at Elsinore (1964) as Fortinbras |
 | The World Ten Times Over (1963) as Tall Man in Nightclub (uncredited) |
| | For King and Country: Out There (1963) as Canadian |
| | Pirate's Passage Writer |
| | Pirate's Passage Producer |
| | Steelyard Blues Executive Producer |
| | FTA Producer |
| | FTA Writer |
