2017Arthur Miller: Writer— Self (archive footage)
2005Meet Mr. Miracle-Gro: The Horace Hagedorn Story
2003Cole Porter in Hollywood: Too Darn Hot— Self
2002A Ring of Endless Light— Grandfather
2001The Majestic— Stan Keller
2000Here's to Life!— Gus Corley
1999Adaletin Dengesi— Daniel Morissey
1995Wild Bill: Hollywood Maverick— Self
1990Old Explorers— Leinen Roth
1990Sky High— Gus Johnson
1989Glory! Glory!— Lester Babbitt
1987Çetin Ceviz— Judge Stanley Murdoch
1987All My Sons— Joe Keller
1985The Adventures of Mark Twain— Mark Twain (voice)
1984Love Those Trains— Narrator
1982Hail Columbia!— Narrator
1982The Klan: A Legacy of Hate in America— Narrator
1980Mark, I Love You— Dwight Hamilton
1980The First Deadly Sin— Dr. Sanford Ferguson
1980Rage!— Borski
1980The Golden Honeymoon— Charley Tate
1979The Horror Show— (archive footage)
1978Bully: An Adventure with Teddy Roosevelt— Teddy Roosevelt
1977Yılanın Yumurtası— Priester
1976The Flying Misfits— Capt. James 'Jim' Gutterman
1975I Will Fight No More Forever— General Oliver O. Howard
1975Give 'em Hell, Harry!— Harry S. Truman
1974Where the Red Fern Grows— Grandpa
1974Il venditore di palloncini— Antonio
1974Man Belongs to the Earth— Narrator
1974The Canterville Ghost— Hyram B. Otis
1973The Harrad Experiment— Philip Tenhausen
1973La polizia incrimina la legge assolve— Commissioner Aldo Scavino
1972Çato: Devlerin Ülkesi— Joshua Everette
1971If Tomorrow Comes— Frank Phillips
1970Tora! Tora! Tora!— Admiral William F. Halsey
1970The Challenge— Overman
1969Muhteşem Yedilinin Silahları— Levi
1968The Split— Herb Sutro
1968Nobody's Perfect— Capt. Mike Riley
1967Chuka— Lou Trent
1967Waterhole #3— Capt. Shipley
1966The Tenderfoot— Captain Ewell
1964Black Like Me— John Finley Horton
1963The Long Lost Life of Edward Smalley— J. Marvin Bean
1962Icarus Montgolfier Wright
1960Who Was That Lady?— Harry Powell
1959Face of Fire— Monk Johnson
1958The Deep Six— Cmdr. Warren Meredith
1958The Restless Years— Ed Henderson
1957The Young Don't Cry— Rudy Krist
1956Crime in the Streets— Ben Wagner
1956The Eddy Duchin Story— Lou Sherwood
1955The Last Frontier— Gus
1955Oklahoma!— Mr. Carnes
1955Battle Cry— MSgt. Mac
1955The McConnell Story— SSgt. / Maj . / Col. Ty 'Dad' Whitman
1954Yeryüzüne Hücum— Sgt. Ben Peterson
1954The Command— Sgt. Elliott
1954The Great Diamond Robbery— Mr. Remlick, Lawyer
1953Kiss Me Kate— Slug
1953Above and Beyond— Maj. William M. Uanna
1953The Girl Who Had Everything— Charles "Chico" Menlow
1953All the Brothers Were Valiant— Fetcher
1952The Hoaxters— Narrator (voice)
1952Shadow in the Sky— Lou Hopke
1952Because You're Mine— Sergeant 'Bat' Batterson
1951It's a Big Country— Mr. Stacey
1951Across the Wide Missouri— Old Bill (uncredited)
1951The Red Badge of Courage— Narrator (voice) (uncredited)
1951Angels in the Outfield— Angel (voice) (uncredited)
1950The Next Voice You Hear...— Joe Smith
1950Elmas Hırsızları— Gus Minissi
1950Please Believe Me— Vincent Maran
1950Mrs. O'Malley and Mr. Malone— John Malone
1950The Outriders— Clint Priest
1949The Undercover Man— George Pappas
1949Savaş Alanı— Kinnie
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