Ralphie, played by Peter Billingsley, is the protagonist in the 1983 film A Christmas Story. He's a young boy who has his heart set on getting a Red Ryder BB Gun for Christmas. The movie depicts the struggles and triumphs of the Parker family as they navigate the holidays, including Ralphie's misadventures, his parents' efforts to maintain the family's traditions, and his struggle to accept the reality of his dream gift.