Donald O'Connor as Peter Stirling

Lori Nelson as Barbara Atwood

Alice Kelley as Cynthia Daniels

Gregg Palmer as William Norton

William Reynolds as Wilbur Van Allen

Les Tremayne as Colonel Daniels

Otto Hulett as Chadwick

David Janssen as Corporal Thomas

James Best as Corporal Ransom

Chill Wills as Francis (voice) (uncredited)

Leonard Nimoy as Football Player (uncredited)