Dennis Christopher
Jack
Elliott Gould
The Giant
Jean Stapleton
The Giantess
Katherine Helmond
Jack's Mother
Mark Blankfield
Strange Little Man / Fairy / Narrator
Jerry Hall
The Lady of the Harp
Lise Lang
Spot, the Cow
Ty Crowley
Lamont Johnson
Spot, the Cow (voice)
Billy Bryan
The Hen Puppeteer
Shelley Duvall
Self - Host (uncredited)
