Mary Sean Young (born November 20, 1959) is an American actress. She is best known for her performances in the films Stripes (1981), Blade Runner (1982), Dune (1984), No Way Out (1987), Wall Street (1987), Cousins (1989) and Ace Ventura: Pet Detective (1994).
Young was born in Louisville, Kentucky, daughter of Donald Young, Jr., a television producer and journalist, and Lee Guthrie (born Mary Lee Kane), a screenwriter, public relations executive, and journalist. Young graduated from Cleveland Heights High School in Cleveland Heights, Ohio, followed by the Interlochen Arts Academy in Interlochen, Michigan. She also attended the School of American Ballet in New York City. Before becoming an actress, Young worked as a model and dancer of ballet, even training with the School of American Ballet.
Young began her film career in 1980 in the film Jane Austen in Manhattan, followed by a role in the 1981 film Stripes. She then played the female lead, Rachael, alongside Harrison Ford in the classic science fiction film Blade Runner (1982). On television in 1986, Young played the female lead opposite Lenny Von Dohlen in Under the Biltmore Clock, based on F. Scott Fitzgerald's story Myra Meets His Family. The following year, she had a small role in the film Wall Street as the wife of Michael Douglas's character, Gordon Gekko. Her role was originally intended to be larger, but was significantly reduced due to clashes with Oliver Stone.