Filmography
| Year | Title | Role |
| 2000 | Audrey Hepburn Retrospective | Actor |
| 1993 | The Portrait | Gardner Church |
| 1991 | Cape Fear (1991) | Lee Heller |
| 1987 | Amazing Grace and Chuck | President |
| 1978 | The Boys From Brazil | Dr. Josef Mengele |
| 1977 | MacArthur | Gen. Douglas MacArthur |
| 1976 | The Omen | Robert Thorn |
| 1973 | Billy Two Hats | Arch Deans |
| 1971 | Shootout | Clay Lomax |
| 1970 | I Walk the Line | Sheriff Tawes |
| 1969 | Mackenna's Gold | MacKenna |
| 1969 | Marooned | Charles Keith |
| 1968 | The Stalking Moon | Sam Varner |
| 1966 | Arabesque | Prof. David Pollock |
| 1965 | John F. Kennedy: Years of Lightning, Day of Drums | Narrator |
| 1965 | Mirage (2006) | David Stillwell |
| 1964 | Behold a Pale Horse | Manuel Artiguez |
| 1963 | Captain Newman, M.D. | Capt. Josiah J. Newman, MD |
| 1962 | How the West Was Won | Cleve Van Valen |
| 1962 | To Kill a Mockingbird | Atticus Finch |
| 1962 | Cape Fear (1962)/On Dangerous Ground | Sam Bowden |
| 1961 | The Guns of Navarone | Capt. Keith Mallory |
| 1959 | On The Beach (1959) | Cmdr. Dwight Lionel Towers |
| 1959 | Pork Chop Hill | Lt. Joe Clemons |
| 1958 | The Big Country | James McKay |
| 1957 | Designing Woman | Mike Hagen |
| 1956 | Moby Dick (1956) | Captain Ahab |
| 1956 | The Man in the Gray Flannel Suit | Tom Rath |
| 1954 | The Purple Plain | Squadron Leader Bill Forrester |
| 1953 | Roman Holiday (1987) | Joe Bradley |
| 1952 | The Snows of Kilimanjaro (1952) | Harry Street |
| 1952 | The World in His Arms | Capt. Jonathan Clark |
| 1951 | Captain Horatio Hornblower | Capt. Horatio Hornblower R.N |
| 1951 | Only the Valiant | Capt. Richard Lance |
| 1950 | The Gunfighter | Jimmy Ringo |
| 1949 | Twelve O'Clock High | Gen. Frank Savage |
| 1949 | The Great Sinner | Fedja |
| 1948 | Yellow Sky | James "Stretch" Dawson |
| 1947 | The Paradine Case | Anthony Keane, Counsel for the Defense |
| 1947 | Gentleman's Agreement | Philip Schuyler 'Phil' Green |
| 1946 | The Yearling | Penny Baxter |
| 1946 | Duel in the Sun | Lewton 'Lewt' McCanles |
| 1945 | Spellbound (1945) | John Ballantine |
| 1945 | The Valley of Decision | Paul Scott |
| 1944 | Days of Glory (2007) | Vladmir |
| 1944 | The Keys of the Kingdom | Father Francis Chisholm |
