The narrator of the classic holiday film "A Christmas Story" is the character Ralphie Parker, played by Peter Billingsley. Ralphie narrates the story as an adult looking back on his childhood and the events that took place around Christmastime. The narration provides insight into Ralphie's thoughts, feelings, and observations about the characters and situations he encounters. The narration is a key element of the film's storytelling, providing a unique perspective on the story and adding humor and warmth to the film's overall tone.