Jean-Paul Belmondo

Character: Arthur Lespinasse

Bourvil

Character: Anatole

David Niven

Character: Colonnel Carol Matthews, aka 'Le Cerveau'

Eli Wallach

Character: Frankie Scannapieco, godfather of the Italian mafia

Silvia Monti

Character: Sofia Scannapieco, Frankie's sister

Raymond Gérôme

Character: Commissioner

Fernand Guiot

Character: Inspector Mazurel, assistant to the commissioner

Jacques Balutin

Character: Inspector Pochet

Jacques Ciron

Character: Inspector Dubœuf

Patrick Préjean

Character: Belgian Sergeant of the armoured car

Robert Dalban

Character: Belgian soldier of the armored car (with a cold)

Raoul Delfosse

Character: Belgian soldier of the armored car

Roland Monk

Character: Belgian soldier of the armored car

Mario David

Character: Jean-François, antique dealer in Le Havre

Henri Génès

Character: Chief warden of Poissy prison

Yves Barsacq

Character: Warden of Poissy prison

Dominique Zardi

Character: Warden of Poissy prison

Max Montavon

Character: Antique dealer in Le Havre, Jean-François’ partner

Paul Mercey

Character: André, the flooded owner of the 5th floor

Henri Attal

Character: Member of the Colonel's gang

Tommy Duggan

Character: Superintendent Cummings

Sophie Grimaldi

Character: Blonde on the train

Roger Lumont

Character: Boss of the shop

John Rico

Character: Member of the Italian mafia

Arch Taylor

Character: Member of the Italian mafia

Trevor A. Stephens

Character:

Pierre Tornade

Character: Belgian Soldier in Armored Car (uncredited)

Micha Bayard

Character: André's Wife (uncredited)

Gérard Hernandez

Character: Policeman in Le Havre (uncredited)

César Torres

Character: (uncredited)

Yvon Dihé

Character: (uncredited)