Alain Delon
as Jef Costello
Jean-Pierre Posier
as Olivier Rey
Robert Favart
as Barkeeper
Roger Fradet
as 1st inspector
Jacques Leroy
as Gunman
Robert Rondo
as 3d inspector
François Périer
as The Superintendant
Nathalie Delon
as Jane Lagrange
Cathy Rosier
as Valérie, la pianiste (as Caty Rosier)
Catherine Jourdan
as Hatcheck Girl
Michel Boisrond
as Wiener
Andre Salgues
as Garage keeper
Carlo Nell
as 2nd inspector
Georges Casati
as Damolini
Jack Leonard
as Garcia
Andre Thorent
as Policeman / cab driver
Jacques Deschamps
as Policeman
Gaston Meunier
as Hotel manager