Filmography
| Year | Title | Role |
| 2017 | Sammy Davis, Jr.: I've Gotta Be Me | Self |
| 2016 | The Trust | Actor |
| 2016 | Dying Laughing | Self |
| 2016 | Jerry Lewis: The Man Behind the Clown | Actor |
| 2013 | Max Rose | Max Rose |
| 2009 | Curious George 2: Follow That Monkey | Stationmaster |
| 2008 | The Nutty, Nutty Boy | Julius Kelp/Buddy Love |
| 2000 | The Nutty Professor 2 - The Klumps | Executive Producer |
| 1996 | The Nutty Professor (1996) | Executive Producer, Writer |
| 1995 | Funny Bones | George Fawkes |
| 1992 | Mr. Saturday Night | Guest |
| 1992 | Arizona Dream | Leo Sweetie |
| 1984 | Slapstick | Wilbur Swain/Caleb Swain |
| 1983 | Smorgasbord | Warren Nefron/Dr. Perks/Gangster/Speed Armeter |
| 1982 | The King of Comedy (1983) | Jerry Langford |
| 1981 | Hardly Working | Bo Hooper |
| 1971 | Which Way to the Front? | Brendan Byers III |
| 1970 | One More Time (1970) | Director |
| 1967 | The Big Mouth | Gerald Clamson/Syd Valentine |
| 1966 | Three on a Couch | Christopher Pride/Warren/Ringo/Rutherford/Heather |
| 1965 | The Family Jewels | Willard Woodward/James Peyton/Everett Peyton/Julius Peyton/Capt. Eddie Peyton/Skylock Peyton/"Bugs" Peyton |
| 1964 | The Disorderly Orderly | Jerome Littlefield |
| 1963 | The Nutty Professor (1963) | Professor Julius Kelp/Buddy Love/Baby Kelp |
| 1963 | Who's Minding the Store? | Norman Phiffier |
| 1962 | It's Only Money | Lester March |
| 1961 | The Errand Boy | Morty S. Tashman |
| 1961 | The Ladies' Man | Herbert H. Heebert/Mama Heebert |
| 1960 | The Bellboy | Stanley/Himself |
| 1960 | Cinderfella | Cinderfella |
| 1959 | Don't Give Up the Ship (1959) | John Paul Steckler I/John Paul Steckler IV/John Paul Steckler VII |
| 1958 | The Geisha Boy | Gilbert Wooley |
| 1958 | Rock-a-Bye Baby | Clayton Poole |
| 1957 | The Sad Sack | Private Meredith C. Bixby |
| 1956 | Hollywood or Bust | Malcolm Smith |
| 1955 | Artists and Models | Eugene Fullstack |
| 1955 | You're Never Too Young | Wilbur Hoolick |
| 1954 | Living It Up | Homer Flagg |
| 1954 | Three Ring Circus | Jerome F. "Jerry" Hotchkiss |
| 1953 | Scared Stiff | Myron Mertz |
| 1952 | Jumping Jacks | Hap Smith |
| 1951 | That's My Boy | `'Junior'` Jackson |
| 1950 | At War With the Army | Private First Class Alvin Corwin |
