Jules, small and weak, dreams of becoming a formidable athlete. He strives every morning to practice physical culture exercises and takes comforting tablets, without success. But he meets Nénette, a woman who, when he kisses her, suddenly endows him with prodigious strength.

Raymond Bussières
Jules

Annette Poivre
Nénette

Jean Ozenne
Specialist Doctor

Pierre Mondy
Accomplice

Jean Richard
Policeman

Gérard Oury
Narrator (voice)

Colette Darfeuil
Dédée

Alexandre Rignault
'Le gorille'
Roger Saget
'Louis XIV'

Robert Le Fort
Milou

Serge Nadaud
Principal curator Anselme Carillon
Al Cabrol
O'Riol

François Joux
The Doctor's assistant

Pierre Duncan
The butcher at the fair

André Chanu
The announcer of the Vél d'Hiv