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University of Pennsylvania grad David Naughton studied for a performing career at the London Academy of Music and Dramatic Arts. Naughton first developed a following via his ubiquitous appearances in the musical Dr. Pepper commercials of the 1970s ("I'm a pepper, you're a pepper" etc.) In 1979, he starred as Billy Manucci on the "disco adventure" TV series Makin' It; Naughton's vocal rendition of the title song was briefly #5 on the pop charts. His subsequent series stints included 1983's At Ease and 1986's My Sister Sam. Naughton is most familiar to horror-flick devotees as reluctant lycanthrope David Kessler in the 1981 film An American Werewolf in London. David Naughton is the younger brother of stage and film actor James Naughton.