| 2016 | The Trust as Jim's FatherWatch Free |
| 2014 | And the Oscar Goes To... |
| 2013 | Till Luck Do Us Part 2 as Chamberlain |
| 2013 | The Trials of Muhammad Ali |
| 2009 | Curious George 2: Follow That Monkey! as Stationmaster (voice) |
| 1995 | Funny Bones as George Fawkes |
| 1993 | Arizona Dream as Leo Sweetie |
| 1992 | Mr. Saturday Night as Jerry Lewis |
| 1989 | Cookie as Arnold Ross |
| 1983 | Cracking Up as Warren Nefron / Dr. Perks / Gangster / Speed Armeter |
| 1982 | Slapstick of Another Kind as Wilbur Swain / Caleb Swain |
| 1982 | The King of Comedy as Jerry Langford |
| 1980 | Hardly Working as Bo Hooper |
| 1970 | Which Way to the Front? as Brendan Byers III |
| 1969 | Hook, Line and Sinker as Peter J. Ingersoll / Fred Dobbs |
| 1968 | Don't Raise the Bridge, Lower the River as George Lester |
| 1967 | The Big Mouth as Gerald Clamson |
| 1966 | Three on a Couch as Christopher Pride / Warren / Ringo / Rutherford / Heather |
| 1966 | Way... Way Out as Pete Mattemore |
| 1965 | Boeing, Boeing as Robert Reed |
| 1965 | The Family Jewels as Willard Woodward / James Peyton / Everett Peyton / Julius Peyton / Eddie Peyton / Skylock Peyton / Bugs Peyton |
| 1964 | The Patsy as Stanley Belt |
| 1964 | The Disorderly Orderly as Jerome LittlefieldWatch Free |
| 1963 | The Nutty Professor as Professor Julius F. Kelp / Buddy Love / Baby Kelp |
| 1963 | Who's Minding the Store? as Norman Phiffer |
| 1963 | It's a Mad Mad Mad Mad World as Driver Who Runs Over Hat (uncredited) |
| 1962 | It's Only Money as Lester March |
| 1961 | The Ladies Man as Herbert H. Heebert / Mama Heebert |
| 1961 | The Errand Boy as Morty S. Tashman |
| 1960 | The Bellboy as Stanley / Himself |
| 1960 | Cinderfella as Cinderfella |
| 1960 | Visit to a Small Planet as Kreton |
| 1959 | Don't Give Up the Ship as John Paul Steckler I / John Paul Steckler IV / John Paul Steckler VII |
| 1959 | Li'l Abner as Cameo |
| 1958 | The Geisha Boy as Gilbert Wooley |
| 1958 | Rock-a-Bye Baby as Clayton Poole |
| 1957 | The Delicate Delinquent as Sidney L. Pythias |
| 1957 | The Sad Sack as Private Meredith C. Bixby |
| 1956 | Pardners as Wade Kingsley Jr. / Wade Kingsley Sr. |
| 1956 | Hollywood or Bust as Malcolm Smith |
| 1955 | Artists and Models as Eugene Fullstack |
| 1955 | You're Never Too Young as Wilbur Hoolick |
| 1954 | Living It Up as Homer Flagg |
| 1954 | 3 Ring Circus as Jerry Hotchkiss |
| 1953 | The Caddy as Harvey Miller |
| 1953 | Scared Stiff as Myron Mertz |
| 1953 | Money from Home as Virgil Yokum |
| 1952 | Sailor Beware as Melvin Jones |
| 1952 | Jumping Jacks as Hap Smith |
| 1952 | Road to Bali as Woman in Lala's Dream (uncredited) |
| 1951 | That's My Boy as 'Junior' Jackson |
| 1951 | The Stooge as Theodore 'Ted' Rogers |
| 1950 | At War with the Army as Alvin Korwin |
| 1950 | My Friend Irma Goes West as Seymour |
| 1949 | My Friend Irma as Seymour |
