James Stewart
Professor Robert Leaf
Fabian
Kenneth 'Kenny' Taylor
Glynis Johns
Vina Leaf
Cindy Carol
Pandora 'Panny' Leaf
Bill Mumy
Erasmus 'Ras' Leaf
John Williams
Peregrine Upjohn
Brigitte Bardot
Brigitte Bardot
Jack Kruschen
Doctor Volker
Charles Robinson
George
Howard Freeman
Dean Sawyer
Jane Wald
Terry, George's Wife
James Brolin
Student at Leaf Rally
Susanne Cramer
Blonde Doll (Upjohn's Girl)
Ed Wynn
The Captain
Paula Lane
Eugenia Clove
Robert Biheller
Orville
Alice Pearce
Office Clerk