Actor
- Strictly Courtroom (2008) .... Matthew Harrison Brady (archive footage) (uncredited)
- Complicated Women (2003) .... Himself (archive footage) (uncredited)
- Brother, Can You Spare a Dime? (1975) .... (archive footage)
- The Iceman Cometh (1973) .... Harry Hope
- ...tick... tick... tick... (1970) .... Mayor Jeff Parks
- Hombre (1967) .... Dr. Alex Favor
- The Presidency: A Splendid Misery (1964) .... Narrator
- Pieta (1964) .... Himself (voice)
- Seven Days in May (1964) .... President Jordan Lyman
- A Tribute to John F. Kennedy from the Arts (1963) .... Himself / Host
- Sequestrati di Altona, I (1963) .... Albrecht von Gerlach
- The Young Doctors (1962) .... Dr. Joseph Pearson
- Inherit the Wind (1960) .... Matthew Harrison Brady
- Middle of the Night (1959) .... Jerry Kingsley
- Tales from Dickens (1958) .... Himself / ... (7 episodes, 1958-1959)
- Albert Schweitzer (1957) .... Narrator
- Alexander the Great (1956) .... Philip of Macedonia
- The Man in the Gray Flannel Suit (1956) .... Ralph Hopkins
- The Desperate Hours (1956) .... Dan C. Hilliard
- Island of Allah (1956) .... Himself / Narrator
- Executive Suite (1954) .... Loren Phineas Shaw
- The Bridges at Toko-Ri (1954) .... Rear Adm. George Tarrant
- Man on a Tightrope (1953) .... Karel Cernik
- Death of a Salesman (1952) .... Willy Loman
- It's a Big Country (1951) .... Joe Esposito
- Lux Video Theatre (1950) .... (2 episodes, 1951-1952)
- The Titan: Story of Michelangelo (1950) .... Himself / Narrator (voice)
- Christopher Columbus (1949) .... Christopher Columbus
- So You Want to Be an Actor (1949) .... Himself (archive footage)
- Another Part of the Forest (1948) .... Marcus Hubbard
- An Act of Murder (1948) .... Judge Calvin Cooke
- The Best Years of Our Lives (1947) .... Al Stephenson
- Tomorrow, the World! (1944) .... Mike Frame
- The Adventures of Mark Twain (1944) .... Samuel Langhorne Clemens (Mark Twain)
- I Married a Witch (1942) .... Jonathan Wooley / Nathaniel Wooley / Samuel Wooley / Wallace Wooley
- Lake Carrier (1942) .... Himself / Narrator
- Bedtime Story (1941) .... Lucius 'Luke' Drake
- One Foot in Heaven (1941) .... William Spence
- So Ends Our Night (1941) .... Josef Steiner
- Victory (1940) .... Hendrik Heyst
- Susan and God (1940) .... Barrie Trexel
- Lights Out in Europe (1940) .... Actor speaking the Commentary (voice)
- The 400 Million (1939) .... Narration (voice)
- Land of Liberty (1939) .... (archive footage)
- Trade Winds (1938) .... Sam Wye
- There Goes My Heart (1938) .... Bill' Spencer
- The Buccaneer (1938) .... Jean Lafitte
- Nothing Sacred (1937) .... Wally Cook
- A Star Is Born (1937) .... Norman Maine
- Screen Snapshots Series 16, No. 5 (1937) .... Himself
- Screen Snapshots Series 16, No. 3 (1936) .... Himself - Observer
- The Road to Glory (1936) .... Lieutenant Michel Denet
- Anthony Adverse (1936) .... Anthony Adverse
- Mary of Scotland (1936) .... Earl of Bothwell
- Anna Karenina (1935) .... Vronsky
- The Dark Angel (1935) .... Alan Trent
- Screen Snapshots Series 14, No. 11 (1935) .... Himself
- Misérables, Les (1935) .... Jean Valjean / Champmathieu
- We Live Again (1934) .... Prince Dmitri Nekhlyudov
- The Barretts of Wimpole Street (1934) .... Robert Browning
- The Affairs of Cellini (1934) .... Benvenuto Cellini
- Death Takes a Holiday (1934) .... Prince Sirki / Death
- Good Dame (1934) .... Mace Townsley
- All of Me (1934) .... Don Ellis
- Hollywood on Parade No. B-6 (1934) .... Himself
- Design for Living (1933) .... Thomas B. 'Tom' Chambers
- The Eagle and the Hawk (1933) .... Jerry H. Young
- The Sign of the Cross (1933) .... Marcus Superbus
- Tonight Is Ours (1933) .... Sabien Pastal
- The Royal Family of Broadway (1933) .... Tony Cavendish
- Smilin' Through (1932) .... Kenneth Wayne (credited) / Jeremy Wayne (uncredited)
- Hollywood on Parade No. A-1 (1932) .... Himself - Host
- Make Me a Star (1932) .... Cameo appearance (himself, at preview) (uncredited)
- Merrily We Go to Hell (1932) .... Jerry Corbett
- Strangers in Love (1932) .... Buddy Drake / Arthur Drake
- Dr. Jekyll and Mr. Hyde (1931) .... Dr. Henry L. Jekyll / Mr. Hyde
- My Sin (1931) .... Dick Grady
- Night Angel (1931) .... Rudek Berken
- Honor Among Lovers (1931) .... Jerry Stafford
- Laughter (1930) .... Paul Lockridge
- Manslaughter (1930) .... Dan O'Bannon
- True to the Navy (1930) .... Bull's Eye McCoy
- Ladies Love Brutes (1930) .... Dwight Howell
- Paramount on Parade (1930) .... Marine (The Montmartre Girl)
- Sarah and Son (1930) .... Howard Vanning
- The Marriage Playground (1929) .... Martin Boyne
- Footlights and Fools (1929) .... Gregory Pyne
- Jealousy (1929) .... Pierre
- Paris Bound (1929) .... Jim Hutton
- The Studio Murder Mystery (1929) .... Richard Hardell
- The Wild Party (1929) .... James 'Gil' Gilmore
- The Dummy (1929) .... Trumbull Meredith
- Paying the Piper (1921) .... Extra (uncredited)


