The basis of the screenplay is a series of monologues written and performed by Jean Shepherd on the radio. Shepherd wrote the adaptation with Bob Clark and Leigh Brown. Several subplots are incorporated into the body of the film, based on other separate short stories by Shepherd. Shepherd provides the film's narration from the perspective of an adult Ralphie, a narrative style later used in the dramedy television series "The Wonder Years". Shepherd, Brown, and Clark have cameo appearances in the film: Shepherd plays the man who directs Ralphie and Randy to the back of the Santa line at the department store; Brown – Shepherd's wife in real life – plays the woman in the Santa line with Shepherd; Clark plays Swede, the neighbor the Old Man talks to outside during the Leg Lamp scene.