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Jerry Lewis as Stanley Belt |
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Ina Balin as Ellen Betz |
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Everett Sloane as Caryl Fergusson |
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Phil Harris as Chic Wymore |
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Keenan Wynn as Harry Silver |
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Peter Lorre as Morgan Heywood |
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John Carradine as Bruce Alden |
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Hans Conried as Prof. Mulerr |
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Quinn O'Hara as Cigarette Girl |
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Richard Deacon as Sy Devore |
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Scatman Crothers as Shoeshine Boy |
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Del Moore as Policeman |
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Neil Hamilton as The Barber |
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Buddy Lester as Copa Café MC |
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Nancy Kulp as Helen, Theatergoer |
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Lloyd Thaxton as Lloyd |
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Norman Alden as Bully at the Gym |
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Jack Albertson as Theatergoer with Helen |
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Henry Slate as Paul |
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Gavin Gordon as Executive on Golf Course |
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Ned Wynn as Band Member |
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Mantan Moreland as Barber Shop Porter |
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Dave Willock as Alec (uncredited) |
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Fritz Feld as Maitre D' |
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Hedda Hopper as Herself |
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Joan Swift as Girl (uncredited) |
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Sherwood Price as Bellboy (uncredited) |
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Bob May as Fireworks Boy (uncredited) |
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Norman Leavitt as Newsboy (uncredited) |
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Jerry Dexter as (uncredited) |
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Fay DeWitt as Woman at Party (uncredited) |
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Chick Chandler as Hedda Hopper's Escort (uncredited) |
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Don Brodie as Bowler (uncredited) |
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Richard Bakalyan as Boy at Spring Hop (uncredited) |
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Ed Wynn as Ed Wynn |
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George Raft as George Raft |
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Rhonda Fleming as Rhonda Fleming |
| Directing | Jerry Lewis | Director |
| Directing | Ralph Axness | Assistant Director |
| Costume & Make-Up | Sy Devore | Wardrobe Designer |
| Writing | Jerry Lewis | Writer |
| Writing | Bill Richmond | Writer |
| Production | Ernest D. Glucksman | Producer |
| Production | Arthur P. Schmidt | Associate Producer |
| Sound | David Raksin | Original Music Composer |
| Camera | W. Wallace Kelley | Director of Photography |
| Editing | John Woodcock | Editor |
| Production | Edward R. Morse | Casting |
| Art | Cary Odell | Art Direction |
| Art | Hal Pereira | Art Direction |
| Art | Sam Comer | Set Decoration |
| Art | Ray Moyer | Set Decoration |
| Costume & Make-Up | Edith Head | Costume Design |
| Costume & Make-Up | Wally Westmore | Makeup Supervisor |
| Costume & Make-Up | Nellie Manley | Hair Supervisor |
| Crew | Marvin Weldon | Dialogue Coach |
| Editing | Russel Wiles | Assistant Editor |
| Directing | Dorothy Yutzi | Script Supervisor |
| Sound | Howard Beals | Sound Effects Editor |
| Sound | Paul Haggar | Music Editor |
| Crew | Paul K. Lerpae | Special Effects |
| Sound | Hugo Grenzbach | Sound Recordist |
| Sound | Charles Grenzbach | Sound Recordist |
| Production | William Davidson | Production Manager |