Filmography
| Year | Title | Role |
| 2015 | Listen to Me Marlon | Voice |
| 2005 | Lost in the Thinking | Actor |
| 2001 | The Score | Max Baron |
| 1996 | The Island of Dr. Moreau | Dr. Moreau |
| 1995 | Don Juan DeMarco | Dr. Jack Mickler |
| 1991 | Hearts of Darkness: A Filmmaker's Apocalypse | Actor |
| 1989 | A Dry White Season | Ian McKenzie |
| 1979 | Apocalypse Now | Colonel Kurtz |
| 1979 | Apocalypse Now Final Cut: The IMAX 2D Experience | Colonel Walter E. Kurtz |
| 1978 | New Movie | Jor-El |
| 1976 | The Missouri Breaks | Lee Clayton |
| 1972 | The Godfather | Don Vito Corleone |
| 1972 | Last Tango in Paris | Paul |
| 1972 | The Nightcomers | Peter Quint |
| 1972 | Letter to Jane: An Investigation About a Still | Self |
| 1969 | Burn! | Sir William Walker |
| 1969 | Night of the Following Day | Bud |
| 1968 | Candy | Grindl |
| 1967 | Reflections in a Golden Eye | Maj. Weldon Penderton |
| 1967 | A Countess From Hong Kong | Ogden Mears |
| 1966 | The Chase (1966) | Sheriff Calder |
| 1966 | The Appaloosa | Matt |
| 1965 | Morituri | Robert Crain |
| 1964 | Bedtime Story | Freddy Benson |
| 1963 | The Ugly American | Ambassador Harrison Carter MacWhite |
| 1962 | Mutiny on the Bounty | 1st Lt. Fletcher Christian |
| 1961 | One-Eyed Jacks | Rio |
| 1960 | The Fugitive Kind | Valentine "Snakeskin" Xavier |
| 1958 | The Young Lions (1958) | Lt. Christian Diestl |
| 1957 | Sayonara | Maj. Gruver |
| 1956 | The Teahouse of the August Moon | Sakini |
| 1955 | Guys and Dolls | Sky Masterson |
| 1954 | On the Waterfront (1954) | Terry Malloy |
| 1954 | Desirée | Napoleon Bonaparte |
| 1953 | The Wild One | Johnny Strabler/Narrator |
| 1953 | Julius Caesar (1979) | Marc Antony |
| 1952 | Viva Zapata! | Emiliano Zapata |
| 1951 | A Streetcar Named Desire (1951) | Stanley Kowalski |
| 1950 | The Men | Ken |
