Kansas City Confidential is a 1952 American film noir and crime film directed by Phil Karlson starring John Payne and Coleen Gray. The film was released in the United Kingdom as The Secret Four. Karlson and Payne teamed a year later for 99 River Street, another film noir, followed by Hell's Island, a film noir in color.

John Howard Payne was an American film actor who is mainly remembered from film noir crime stories and 20th Century Fox musical films, and for his leading roles in Miracle on 34th Street and the NBC Western television series The Restless Gun.