William Theodore Katt (born February 16, 1951) is an American film and television actor, voice artist and musician best known as the star of the television series The Greatest American Hero. He first became known for playing Tommy Ross, the ill-fated prom date of Carrie White in the film version of Carrie (1976) and subsequently starred in films such as First Love (1977), Big Wednesday (1978) and Butch and Sundance: The Early Days (1979). Between 1985 and 1988, he starred in nine Perry Mason television films alongside his mother Barbara Hale, who reprised her role as Della Street from the television series Perry Mason.