| 2022 | Rat Pack | Self (archive footage) |
| 2020 | The Godfather, Coda: The death of Michael Corleone | Osvaldo Altobello |
| 2015 | The Train | Andre |
| 2014 | Showing Up | Self |
| 2010 | Phố Wall: Ma Lực Đồng Tiền | Julie Steinhardt |
| Ahead of Time: The Extraordinary Journey of Ruth Gruber | Mordechai Rossman (voice) |
| Người Chấp Bút | Old man |
| 2009 | In the Name of Democracy | Narrator |
| The Toe Tactic | Maestro |
| 2008 | New York, I Love You | Abe |
| Il falso bugiardo | Self (archive footage) |
| Vote and Die: Liszt for President | Joe Nightingale |
| 2007 | Mama's Boy | Seymour Warburton |
| Brando | Self |
| 2006 | Nơi Tình Yêu Bắt Đầu | Arthur Abbott |
| The Hoax | Noah Dietrich |
| The Real James Dean | Self |
| Baby Doll: See No Evil | Self |
| Sergio Leone - Il mio modo di vedere le cose | Self |
| The Linen Book: Lost Images From 'The Magnificent Seven' | Self |
| 2005 | A Taste Of Jupiter | Arturo |
| Steve McQueen: The Essence of Cool | Self |
| James Dean: Sense Memories | Self |
| The Moon and the Son: An Imagined Conversation | Father |
| 2004 | The Easter Egg Adventure | Narrator (voice) |
| Unforgivable Blackness: The Rise and Fall of Jack Johnson | Other Voices (voice) |
| King of the Corner | Sol Spivak |
| Reconstructing 'The Good, The Bad And The Ugly' | Self |
| Leone's West | Self |
| Por un puñado de sueños | Self - Interviewee |
| 2003 | Dòng Sông Kỳ Bí | Mr. Loonie (uncredited) |
| Horatio's Drive: America's First Road Trip | Other Voices (voice) |
| Rita | Self |
| The Education of Gore Vidal | Self |
| Broadway: The Golden Age, by the Legends Who Were There | Self |
| Time Machine: When Cowboys Were King | Self / Narrator |
| 2002 | Making 'The Misfits' | Self |
| Cinerama Adventure | Self |
| Monday Night Mayhem | Leonard Goldenson |
| 2000 | Clint Eastwood: Out of the Shadows | Self |
| Uninvited | Alan Strasser |
| Guns for Hire: The Making of 'The Magnificent Seven' | Self |
| Keeping the Faith | Rabbi Ben Lewis |
| The Bookfair Murders | Erich Schmidt |
| 1998 | Naked City: Justice with a Bullet | Deluca |
| 1997 | The Trial of Adolf Eichmann | Pinchas Freudiger / David Ben-Gurion (voices) |
| Twentieth Century Fox: The First 50 Years | Self |
| 1996 | The Associate | Donald Fallon |
| O. Henry's Christmas | Behrman ("The Last Leaf") |
| Honey Sweet Love | Don Siro |
| Clark Gable: Tall, Dark, and Handsome | Self |
| The Search for Dracula | Narrator |
| 1995 | Two Much | Sheldon |
| James Dean: A Portrait | Self |
| Elia Kazan: A Director's Journey | Narrator |
| Yul Brynner: The Man Who Was King | Self |
| 1994 | It's Alive: The True Story of Frankenstein | Narrator |
| Marilyn Monroe: The Mortal Goddess | Self |
| Martha Graham: The Dancer Revealed | Self |
| The Man Who Drew Bug-Eyed Monsters | Self - Narrator (voice) |
| 1993 | Vendetta II: The New Mafia | Frank Latella |
| 1992 | Lincoln | William Crook (voice) |
| The Donner Party | voice |
| Night and the City | Peck |
| Teamster Boss: The Jackie Presser Story | Bill Presser |
| Mistress | George Lieberhof |
| Nonsense and Lullabyes: Poems | (voice) |
| Legacy of Lies | Moses Resnick |
| Article 99 | Sam Abrams |
| Nonsense and Lullabyes: Nursery Rhymes | (voice) |
| 1991 | Terezín Diary | Narrator |
| Coney Island | Self - Actor |
| 1990 | Bố Già 3 | Don Altobello |
| Sanford Meisner: The American Theatre's Best Kept Secret | Self |
| The Two Jakes | Cotton Weinberger |
| The Godfather Family: A Look Inside | Self / Don Altobello |
| 1988 | Hello Actors Studio | Self |
| An Empire of Reason | Anti-Federalist Spokesman |
| Funny | Self |
| 1987 | Hollywood Uncensored | Self |
| The Impossible Spy | Yacov |
| Nuts | Dr. Herbert A. Morrison |
| Hollywood's Favorite Heavy: Businessmen on Prime Time TV | Self - Host |
| Spark Among the Ashes: A Bar Mitzvah in Poland | Narrator (voice) |
| 1986 | Something in Common | Norman Voss |
| Tough Guys | Leon B. Little |
| Rocket to the Moon | Mr. Prince |
| 1985 | Murder: By Reason of Insanity | Dr. Huffman |
| Embassy | Joe Verga |
| 1984 | Sam's Son | Sam Orowitz |
| Anatomy of an Illness | Dr. William Hitzig |
| 1982 | Bài Ca Đao Phủ | Vern Damico |
| The Wall | Mauritzi Apt |
| 1981 | Skokie | Bert Silverman |
| The Salamander | General Leporello |
| The Pride of Jesse Hallam | Sal Galucci |
| 1980 | Fugitive Family | Olan Vacio |
| Guri | — |
| The Hunter | Ritchie Blumenthal |
| Memoirs of a Movie Palace: The Kings of Flatbush | Self - Narrator (voice) |
| 1979 | Winter Kills | Joe Diamond |
| Firepower | Sal Hyman |
| 1978 | The Pirate | Ben Ezra |
| Movie Movie | Vince Marlow / Pop |
| Squadra antimafia | Don Gerolamo Giarra |
| Girlfriends | Rabbi Gold |
| Circle of Iron | Man-in-Oil |
| 1977 | The Deep | Adam Coffin |
| The Domino Principle | Gen. Reser |
| Nasty Habits | Monsignor |
| The Sentinel | Detective Gatz |
| 1976 | E tanta paura | Peter Struwwel |
| Independence | Benjamin Franklin |
| 1975 | Attenti al buffone | Cesare |
| Il bianco, il giallo, il nero | Sheriff Edward Gideon / aka Black Jack |
| 1974 | Houston, We've Got a Problem | Narrator (voice) |
| Crazy Joe | Don Vittorio |
| Indict and Convict | DeWitt Foster |
| 1973 | Cinderella Liberty | Lynn Forshay |
| L'ultima chance | Joe |
| A Cold Night's Death | Frank Enari |
| 1971 | ¡Viva la muerte... tua! | Maz Lozoya |
| The Typists | Paul Cunningham |
| Le Roman d'un voleur de chevaux | Kifke |
| Paradise Lost | Leo Gordon |
| 1970 | The People Next Door | Arthur Mason |
| The Angel Levine | Delicatessen Clerk |
| The Adventures of Gerard | Napoleon Bonaparte |
| Zig Zag | Mario Gambretti |
| The Reason Why | Charles |
| 1969 | Mackenna's Gold | Ben Baker |
| Le Cerveau | Frankie Scannapieco, Godfather of the Italian Mafia |
| 1968 | I quattro dell'Ave Maria | Cacopoulos |
| A Lovely Way to Die | Tennessee Fredericks |
| How to Save a Marriage and Ruin Your Life | Harry Hunter |
| 1967 | The Tiger Makes Out | Ben Harris |
| The Owl Who Gave a Hoot | Mr. Owl (voice) |
| 1966 | Thiện, Ác, Tà | Tuco Ramirez |
| How to Steal a Million | Davis Leland |
| The Poppy Is Also a Flower | 'Happy' Locarno |
| 1965 | Genghis Khan | Shah of Khwarezm |
| Lord Jim | The General |
| 1964 | Kisses for My President | Raphael Valdez Jr. |
| The Moon-Spinners | Stratos |
| 1963 | Act One | Warren Stone |
| The Victors | Sgt. Craig |
| 1962 | How the West Was Won | Charlie Gant |
| Hemingway’s Adventures of a Young Man | John |
| 1961 | The Misfits | Guido |
| 1960 | Bảy Tay Súng Oai Hùng | Calvera |
| Seven Thieves | Poncho |
| Lullaby | Johnny Horton |
| 1959 | I, Don Quixote | Sancho Panza / Cervantes' Manservant |
| For Whom the Bell Tolls | Rafael |
| 1958 | The Gift of the Magi | Narrator |
| The Plot to Kill Stalin | Poskrebyshev |
| The Lineup | Dancer |
| 1957 | The Lark | Dauphin |
| 1956 | Baby Doll | Silva Vacarro |