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James Stewart as Professor Robert Leaf |
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Fabian as Kenneth 'Kenny' Taylor |
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Glynis Johns as Vina Leaf |
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Cindy Carol as Pandora 'Panny' Leaf |
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Bill Mumy as Erasmus 'Ras' Leaf |
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John Williams as Peregrine Upjohn |
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Brigitte Bardot as Brigitte Bardot |
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Jack Kruschen as Doctor Volker |
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Charles Robinson as George |
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Howard Freeman as Dean Sawyer |
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Jane Wald as Terry, George's Wife |
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James Brolin as Student at Leaf Rally |
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Susanne Cramer as Blonde Doll (Upjohn's Girl) |
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Ed Wynn as The Captain |
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Paula Lane as Eugenia Clove |
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Robert Biheller as Orville |
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Alice Pearce as Office Clerk |
| Directing | Henry Koster | Director |
| Writing | Hal Kanter | Writer |
| Writing | John Haase | Novel |
| Production | Henry Koster | Producer |
| Editing | Marjorie Fowler | Editor |
| Camera | Lucien Ballard | Director of Photography |
| Sound | George Duning | Original Music Composer |
| Writing | Nunnally Johnson | Writers' Assistant |
| Art | Malcolm Brown | Art Direction |
| Art | Dennis J. Parrish | Assistant Property Master |
| Costume & Make-Up | Moss Mabry | Costume Design |
| Crew | L.B. Abbott | Special Effects |
| Crew | Emil Kosa Jr. | Special Effects |
| Costume & Make-Up | Ben Nye | Makeup Artist |
| Sound | Elmer Raguse | Sound |
| Crew | Art Cruickshank | Special Effects |
| Costume & Make-Up | Margaret Donovan | Hairstylist |
| Art | Walter M. Scott | Set Decoration |
| Costume & Make-Up | Lynn F. Reynolds | Makeup Artist |
| Directing | Fred R. Simpson | Assistant Director |
| Production | Fred Kohlmar | Producer |
| Art | Jack Martin Smith | Art Direction |
| Sound | Arthur Morton | Orchestrator |
| Art | Steven Potter | Set Decoration |
| Sound | Alfred Bruzlin | Sound |
