William Theodore Katt is an American actor and musician. He is best known for his starring role as Ralph Hinkley/Hanley on the ABC television series The Greatest American Hero (1981–83).

Carrie is a 1976 American supernatural horror film directed by Brian De Palma from a screenplay written by Lawrence D. Cohen, adapted from Stephen King's 1974 epistolary novel of the same name. The film stars Sissy Spacek as Carrie White, a shy teenage girl who is constantly mocked and bullied at her school. The film also features Piper Laurie, Amy Irving, Nancy Allen, William Katt, P. J. Soles, Betty Buckley, and John Travolta in supporting roles. It is the first film in the Carrie franchise.