Chubby William Tracy starred as Dodo Doubleday, a feckless Army draftee blessed (or cursed) with a photographic memory. Inexplicably promoted to sergeant, Doubleday becomes the bane of topkick Sgt. Ames' (Joe Sawyer) existence.
| Actor | Role |
|---|---|
 William TracySgt. Dorian 'Dodo' Doubleday | Sgt. Dorian 'Dodo' Doubleday |
 James GleasonCol. 'Spitfire' Barkley | Col. 'Spitfire' Barkley |
 Noah Beery Jr.Charlie Cobb | Charlie Cobb |
 Joe SawyerSgt. William Ames | Sgt. William Ames |
 Elyse KnoxJeannie | Jeannie |
 Douglas FowleyCapt. Rossmead | Capt. Rossmead |
 Knox ManningRadio Interviewer Cardigan | Radio Interviewer Cardigan |
 Frank FaylenPvt. Skivic | Pvt. Skivic |
 Dub TaylorMalloy | Malloy |
 Bert MoorhouseRadio Station Announcer | Radio Station Announcer |