David Walsh Naughton (born February 13, 1951) is an American actor and singer known for his starring roles in the horror film An American Werewolf in London (1981) and the Disney comedy Midnight Madness (1980), as well as for a long-running "Be a Pepper" ad campaign for beverage maker Dr Pepper. He also starred in the short-lived sitcom Makin' It and sang its hit theme song "Makin' It", giving him a Top 5 hit on the Billboard charts.