Baby Sister is a 1983 television film directed by Steven Hilliard Stern. The film, which stars Phoebe Cates, Ted Wass and Pamela Bellwood, centers on a 19-year-old sultry college dropout Annie Burroughs (Phoebe Cates) who starts an affair with her older sister's Marsha (Pamela Bellwood) boyfriend David Mitchell (Ted Wass).