Johnny O'Clock is a 1947 American film noir crime film directed by Robert Rossen and starring Dick Powell as Johnny O'Clock, Evelyn Keyes as Nancy Hobson, Lee J. Cobb as Inspector Koch, Ellen Drew as Nelle Marchettis, and Nina Foch as Harriet Hobson. The story follows Johnny, a junior partner in an upmarket casino with Guido Marchettis, whose shady past begins to surface after the suspicious death of a hat-check girl at the casino. As tensions rise, Johnny falls for Nancy, but must confront his business partner and the detective investigating the crime, while also navigating his own complicated relationships.