"During World War II, a junior American Army officer, Lt. Peter Stirling, gets sent to the psychiatric ward whenever he insists that an Army mule named Francis speaks to him."
Donald O'Connor
as Peter Stirling
Patricia Medina
as Maureen Gelder
Zasu Pitts
as Valerie Humpert
Ray Collins
as Colonel Hooker
John McIntire
as General Stevens
Eduard Franz
as Colonel Plepper
Howland Chamberlain
as Major Nadel
James Todd
as Colonel Saunders
Robert Warwick
as Colonel Carmichael
Frank Faylen
as Sergeant Chillingbacker
Tony Curtis
as Captain Jones
Mikel Conrad
as Major Garber
Loren Tindall
as Major Richards
Charles Meredith
as Banker Munroe
Chill Wills
as Francis the Talking Mule (voice)
Arthur Lubin
Director
Robert Arthur
Producer
Frank Skinner
Music
Irving Glassberg
Director of Photography
Bernard Herzbrun
Art Direction
Richard H. Riedel
A. Roland Fields
Set Decoration
Russell A. Gausman
Rosemary Odell
Costume Design
Joan St. Oegger
Hairstylist
Bud Westmore
Makeup Artist
Leslie I. Carey
Sound
Corson Jowett
David S. Horsley
Special Effects
Joan Hathaway
Dialogue
M.H. Lencer
Technical Advisor
David Stern
Novel
Screenplay
Milton Carruth
Editor