Farley Granger
— William Calhoun Denny
Shelley Winters
— Katherine "Kate" Denny
William Demarest
— O'Ryan
Francis L. Sullivan
— Fat Freddy
Margalo Gillmore
— Kate's Mother
Lon Chaney Jr.
— Pinky
Hans Conried
— Norbert Gillespie
Elisha Cook Jr.
— Albert Jonas
Glenn Anders
— Pete the Pusher
Allen Jenkins
— Police Plainclothesman
Sheldon Leonard
— Shortwave Bert
Marvin Kaplan
— Max the Umbrella
Henry Corden
— Numi
Don Beddoe
— Sgt. O'Neill (uncredited)
Kathleen Freeman
— Pet Shop Proprietor's Wife (uncredited)
Herb Vigran
— Police Desk Sergeant (uncredited)
King Donovan
— Lingerie Shop Proprietor (uncredited)