Leon Rollo whose nickname is "Patate" is an inventor adored by his wife and is daughter. He is mostly happy but his best friend Noël seems to succeed in everything he undertakes... Patate become increasingly jealous of this incredible luck.
Jean Marais
as Noël Carradine
Danielle Darrieux
as Edith Rollo
Pierre Dux
as Léon 'Patate' Rollo
Sylvie Vartan
as Alexa Rollo
Anne Vernon
as Véronique Carradine
Jane Marken
as Berthe
Noël Roquevert
as Monsieur Michalon
Hubert Deschamps
as Adrien
Jacques Jouanneau
as Marcel
Henri Virlogeux
as Professor Bichard
Mike Marshall
as Jean-François de Baylac
Laurence Badie
as Jeannette
