Filmography
| Year | Title | Role |
| 2022 | American: An Odyssey to 1947 (2023) | Self |
| 2018 | The Other Side of the Wind | Director, Film Editing, Screenwriter |
| 1993 | It's All True | Director |
| 1987 | Someone to Love | Danny's Friend |
| 1986 | The Transformers: The Movie | Unicron |
| 1981 | Butterfly (1982) | Judge Rauch |
| 1980 | The Secret of Nikola Tesla | J.P. Morgan |
| 1979 | The Muppet Movie | Lew Lord |
| 1976 | Voyage of the Damned | José Estedes |
| 1975 | And Then There Were None | Voice of Tape |
| 1975 | Bad Bugs Bunny | Narrator |
| 1973 | F for Fake | Director, Film Editing, Self, Writer |
| 1972 | Necromancy | Mr. Cato |
| 1972 | Malpertuis | Cassavius |
| 1972 | Get to Know Your Rabbit | Mr. Delasandro |
| 1971 | A Safe Place | The Magician |
| 1971 | Directed by John Ford | Narrator |
| 1970 | Catch-22 | Brig. Gen. Dreedle |
| 1970 | The Kremlin Letter | Bresnavitch |
| 1969 | The Southern Star | Plankett |
| 1969 | The Maori Merchant of Venice | Shylock |
| 1969 | Tepepa | Colonel Cascorro |
| 1968 | The Immortal Story | Mr. Charles Clay |
| 1968 | House of Cards | Leschenhaut |
| 1968 | Oedipus the King | Tiresias |
| 1967 | I'll Never Forget What's 'is Name | Jonathan Lute |
| 1967 | The Sailor From Gibraltar | Louis de Mozambique |
| 1967 | Casino Royale (1967) | Le Chiffre |
| 1966 | A Man for All Seasons | Cardinal Wolsey |
| 1966 | Is Paris Burning? | Consul Raoul Nordling |
| 1965 | Buster Keaton Shorts | Narrator |
| 1965 | Chimes at Midnight | Falstaff |
| 1963 | La Ricotta | Actor |
| 1963 | The V.I.P.s | Max Buda |
| 1962 | RoGoPaG | The "Director" |
| 1962 | The Trial | Albert Hastler (The Advocate) |
| 1960 | David and Goliath (1961) | King Saul |
| 1959 | Compulsion (1959) | Jonathan Wilk |
| 1958 | Touch of Evil | Police Captain Hank Quinlan |
| 1958 | The Long, Hot Summer | Will Varner |
| 1958 | The Roots of Heaven | Cy Sedgewick |
| 1957 | Man in the Shadow | Virgil Renchler |
| 1956 | Moby Dick (1956) | Father Mapple |
| 1955 | The Wide World of Orson Welles | Actor, Director |
| 1955 | Confidential Report | Gregory Arkadin |
| 1954 | Royal Affairs in Versailles | Benjamin Franklin |
| 1953 | Othello / Return to Glennascaul | Narrator |
| 1953 | THREE CASES OF MURDER | Lord Mountdrago |
| 1952 | The Merchant of Venice (1980) | Othello |
| 1950 | The Black Rose | Bayan |
| 1949 | Prince of Foxes | Cesare Borgia |
| 1949 | Le troisième homme | The Third Man |
| 1948 | Macbeth (1948) | Macbeth |
| 1948 | Rita Hayworth:The Lady from Shanghai | Michael O'Hara |
| 1947 | Monsieur Verdoux | Writer |
| 1946 | Tomorrow Is Forever | John Andrew MacDonald/Erik Kessler |
| 1946 | The Stranger (1946) | Professor Charles Rankin |
| 1944 | Jane Eyre (TV-2007) | Edward Rochester |
| 1944 | Follow the Boys | Mercury Wonder Show |
| 1942 | The Magnificent Ambersons | Director, Producer, Screenwriter |
| 1942 | Confidential Report / Journey Into Fear | Colonel Haki |
| 1941 | Citizen Kane (1946) | Charles Foster Kane |
| 1938 | Too Much Johnson | Director, Film Editing, Producer, Screenwriter |
| 1937 | The Spanish Earth | Narrator |
| 1934 | The Hearts of Age | Death |
