Filmography
| Year | Title | Role |
| 1976 | The Lindbergh Kidnapping Case | Judge Trenchard |
| 1976 | Two Minute Warning | The Pickpocket |
| 1973 | Harry in Your Pocket | Casey |
| 1968 | Funny Girl (1968) | Florenz Ziegfeld |
| 1967 | Warning Shot | Orville Ames |
| 1963 | The Two Colonels | Colonello Timothy Henderson |
| 1963 | The Shortest Day 2015 | Ernest Hemingway |
| 1962 | Advise and Consent | Senate Majority Leader |
| 1962 | Big Red | James Haggin |
| 1961 | Voyage to the Bottom of the Sea | Adm. Harriman Nelson |
| 1956 | Forbidden Planet | Dr. Edward Morbius |
| 1955 | Hit The Deck | Rear Adm. Daniel Xavier Smith |
| 1954 | The Last Time I Saw Paris | James Ellswirth |
| 1954 | Executive Suite | Frederick Y. Alderson |
| 1954 | Men of the Fighting Lady | Comdr. Kent Dowling |
| 1953 | Dream Wife | Walter McBride |
| 1952 | The Bad and the Beautiful | Harry Pebbel |
| 1952 | Million Dollar Mermaid | Frederick Kellerman |
| 1950 | That Forsyte Woman | Young Jolyon Forsyte |
| 1950 | The Miniver Story | Clem Miniver |
| 1948 | Julia Misbehaves | William Sylvester Packett |
| 1944 | Mrs. Parkington | Major Augustus Parkington |
| 1943 | Madame Curie | Pierre Curie |
| 1942 | Mrs. Miniver | Clem Miniver |
| 1941 | How Green Was My Valley | Mr. Gruffydd, Village Preacher |
| 1941 | Man Hunt (1941) | Captain Alan Thorndike |
| 1941 | Blossoms in the Dust | Sam Gladney |
| 1940 | Phantom Raiders | Nick Carter |
| 1940 | The Dark Command | William 'Will' Cantrell |
| 1940 | Flight Command | Squadron Cmdr. Billy Gary |
| 1940 | It's a Date | John Arlen |
| 1940 | The House Across the Bay | Tim Nolan |
| 1939 | 6,000 Enemies | Steve Donegan |
| 1939 | MGM Shorts & Nick Carter, Master Detective | Nicholas "Nick" Carter |
| 1938 | Listen, Darling | Richard Thurlow |
| 1938 | The Girl of the Golden West | Sheriff Jack Rance |
| 1937 | Saratoga | Hartley Madison |
| 1936 | Big Brown Eyes | Richard Morey |
| 1933 | Rockabye | Commissioner Al Howard |
| 1930 | Show Girl in Hollywood | Premiere Emcee |
| 1930 | Viennese Nights | Franz von Renner |
