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Dennis Christopher as Jack |
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Elliott Gould as The Giant |
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Jean Stapleton as The Giantess |
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Katherine Helmond as Jack's Mother |
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Mark Blankfield as Strange Little Man / Fairy / Narrator |
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Jerry Hall as The Lady of the Harp |
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Lise Lang as Spot, the Cow |
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Ty Crowley as Spot, the Cow |
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Lamont Johnson as Spot, the Cow (voice) |
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Billy Bryan as The Hen Puppeteer |
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Shelley Duvall as Self - Host (uncredited) |
| Art | Jefferson Eliot | Production Design |
| Production | Bridget Terry | Associate Producer |
| Sound | Frank Serafine | Original Music Composer |
| Production | Shelley Duvall | Producer |
| Production | Fred Fuchs | Associate Producer |
| Production | Jonathan T. Taplin | Producer |
| Art | Michael Erler | Art Direction |
| Costume & Make-Up | J. Allen Highfill | Costume Design |
| Art | Lissa Kapstrom | Set Decoration |
| Sound | Frank Serafine | Music Arranger |
| Production | Paula Montgomery | Production Coordinator |
| Costume & Make-Up | Richard Sabre | Hair Designer |
| Lighting | Bill Klages | Lighting Design |
| Lighting | Mark J. Levin | Lighting Director |
| Costume & Make-Up | Sheryl Ptak | Makeup Designer |
| Costume & Make-Up | Tony Fiorito | Wardrobe Assistant |
| Costume & Make-Up | Ron Wild | Makeup Designer |
| Sound | Ron Cronkhite | Sound |
| Production | Lynn Houston | Producer's Assistant |
| Production | Annette Lorenz | Production Assistant |
| Production | Harold Schiff | Production Consultant |
| Production | Steve Auer | Unit Manager |
| Production | Loretta Masters | Unit Manager |
| Production | Melissa Rhys Moore | Production Coordinator |
| Costume & Make-Up | Beth Alexander | Wardrobe Assistant |
| Production | Sandra Pearson | Producer's Assistant |
| Production | Robert N. Chester | Production Consultant |
| Production | Terry Corey | Production Coordinator |
| Sound | Van Dyke Parks | Music Consultant |
| Art | Bruce Ryan | Art Direction |
| Directing | Lamont Johnson | Director |
| Writing | Mark Curtiss | Writer |
| Writing | Rod Ash | Writer |
| Production | Shelley Duvall | Executive Producer |
| Editing | Marco Zappia | Editor |
