"Alain, "a young wolf", elegant and racy, is maintained by the princess Linzani. At the same time, he goes out with a girl of his age, Sylvie, who despite her bold attitude has never had a lover."
Christian Hay
as Alain Langlois
Haydée Politoff
as Sylvie
Yves Beneyton
as Jean-Emmanuel de Saint-Sever, dit Chris
Maurice Garrel
as Ugo Castellini
Gamil Ratib
as Prince Linzani
Stéphane Bouy
as Riccione, le photographe
Rolande Kalis
as Evelyne
Bernard Dhéran
as Jean-Noël
Elizabeth Teissier
as Princesse Linzani
Serge Leeman
as Jojo
René Lefèvre-Bel
as Gaston, le majordome
Luc Bongrand
as Eddie
Élina Labourdette
as Madame Sinclair
Roland Lesaffre
as Albert
Muni
as Irma, la femme de chambre (uncredited)
Robert De Niro
as Un hippie chez Popov (uncredited)
Cyril Azzam
as Chanteur à la Cage (uncredited)
Lucien Callamand
as Petit rôle (uncredited)
Gilbert Dall'Anese
as Saxophoniste à la Cage (uncredited)
Pierre Leproux
as Le pianiste (uncredited)
Anny Nelsen
as Kim, le modèle (uncredited)
Jean Panisse
as Le garagiste (uncredited)
Gilbert Servien
as Inspecteur commissariat (uncredited)
Eddie Sparrow
Roger Trapp
as Le passager du train (uncredited)
Marcel Carné
Director
Claude Accursi
Writer
Jacques Robin
Director of Photography
Renée Lichtig
Editor
Jack Arel
Original Music Composer
Guy Magenta