The narrator in the classic holiday movie "A Christmas Story" is played by veteran actor Peter Billingsley, who also played Ralphie in the original 1966 version of the film. The character of the narrator serves as an omniscient observer and storyteller, providing context and insight into the lives of the characters and their experiences during the Christmas season. In the film, the narrator's voice is heard throughout the story, offering commentary and providing context for the characters' actions and motivations.