Broadway Jungle (1955)

In Hollywood, fledgling director Fletcher Mathering, harassed by the landlord for rent, explains that he has finally found a backer for his new movie, Death Takes a Spree, and so should soon be flush. That backer proves to be George "Georgie-boy" Gomez, a local hood who, we discover, has stolen the money he's proposing to pay to Fletcher from Boss (uncredited), a vicious gangster. Georgie-boy's sole provision is that the movie should star Lena Little, an actress whose star has faded for all but a certain hood who will always carry a gun in his pocket for her.