Générique complet
Sacrée jeunesse
André Luguet
Thomas Longué
Gaby Morlay
Zabeth Longué
Micheline Dax
Mathilde Billard, Thomas's secretary and lover
Guy Bertil
Jean-Paul Longué, son of Étienne and Armande
Jacques Morel
Étienne Longué, nephew of Thomas
Gisèle Grandpré
Armande Longué, wife of Étienne
Noël Roquevert
Mr. Horville, insurance agent
Claudie Laurence
Sophie
Lisette Lebon
Odile
Mischa Auer
Professor Koranoff
Guy Bedos
Mike, young man who was slapped
Daniel Cauchy
Gérard
Paul Faivre
Abbot
Paul Villé
Dr. Trémière
Andrée Guize
Mrs. Deponchette
Arielle Coigney
YC
Yolande Cola
Jean-Pierre Cassel
Young man at the nightclub (uncredited)
Rivers Cadet
Longués' driver (uncredited)
JJ
Jacques Joignant
Young man at the nightclub (uncredited)
Émile Riandreys
Bartender at the nightclub (uncredited)