Robert Wightman

Robert Douglas Wightman ( born December 29, 1952 in Los Angeles, California) is an American actor. His most famous role was that of John -Boy Walton, replacing original actor Richard Thomas, in the television series The Waltons, which he played from 1979 to 1982. Among his most popular films include An American Gigolo and Father's Day, in which he played a serial killer.