The story follows the son of a millionaire from the 1920s to the 1960s. After losing his fortune in the stock-exchange crash, he teams up with an equestrienne and becomes a circus clown.

Pierre Étaix
as Yoyo / The Millionaire

Claudine Auger
as Isolina

Philippe Dionnet
as Yoyo enfant

Luce Klein
as L'écuyère

Martine de Breteuil
as Madame de Briac

Philippe Castelli
as Le domestique

Luc Delhumeau
as Le douanier

Gabrielle Doulcet
as La dame au collier

Pierre Moncorbier
as Le pique-assiettes

Roger Trapp
as Le représentant en farces et attrapes