Farley Granger
— Nicholas 'Nicky' Bradna
Anthony Quinn
— Phil Regal
Anne Bancroft
— Rosalie Regalzyk
Peter Graves
— Joe McFarland
Else Neft
— Mrs. Regalzyk
Sara Berner
— Millie Swadke
Jerry Paris
— Latzi Franks
Mario Siletti
— Antonio Cardini
James Flavin
— Attorney Michael X. Flanders
Whit Bissell
— Dist. Atty. Blaker
Joe Turkel
— Shimmy
Joyce Terry
— Margie (as Joy Terry)
Harry Tyler
— I. Barricks
Jerry Hausner
— Louie
Frank Baker
G. Pat Collins
Jeanne Cooper
— Evelyn, Latzi's fiancée (uncredited)
Angela Stevens
Frank Sully
Lee Van Cleef
— Harry Goldish (uncredited)
Mickey Knox
John Larch
— Desk Sergeant (uncredited)
Mort Mills
— Finney (uncredited)