My Favorite Brunette

From Wikipedia: My Favorite Brunette is a 1947 movie spoofing movie detectives and the film noir style. Starring Bob Hope and Dorothy Lamour, it also features Lon Chaney, Jr. playing Willie, a character based on his Of Mice and Men role Lennie; Peter Lorre as Kismit, a comic take on his many film noir roles; and cameo appearances by film noir regular Alan Ladd and Hope partner Bing Crosby. Hope plays a photographer who dreams about being a real private detective like his friend Sam McCloud (Ladd). One day he is mistaken for a detective by a mysterious lady in distress (Lamour) and soon finds himself involved in a murder mystery.