<P> Moving to New York at age 20, she performed in a number of Burger King advertisements in the 1980s along with Sarah Michelle Gellar and Elisabeth Shue, her eventual co-star in Back to the Future Part II and Back to the Future Part III . </P> <P> Thompson made her home - media screen debut in 1982 as Cecily "Sissy" Loper in the interactive live - action video game MysteryDisc: Murder, Anyone? and her movie debut in 1983, with Jaws 3 - D. She recalled the film as "the very first movie I ever got, but I lied and said I had done a couple of other movies, so when I showed up, I really knew absolutely nothing . Also, I had said that I knew how to water ski . And I did not . So I had, like, five days to learn really, really complicated water - skiing things, because I had to fit into the Sea World water - skiing show . I don't even know how to swim!" She followed this with All the Right Moves (1983), Red Dawn (1984), and The Wild Life (1984). </P> <P> Thompson's most famous role is that of Lorraine Baines McFly in the Back to the Future trilogy, with the first film released in 1985 . Thompson's character is the mother of Marty McFly, played by Michael J. Fox, whom Marty meets when she is a 1950s adolescent age after he travels back in time; he has to avoid having Lorraine fall in love with him instead of with his future father, George (Crispin Glover), which leads to awkward scenes where Lorraine is attracted to him . </P> <P> In 1986, Thompson starred in SpaceCamp and Howard the Duck . For the latter film, she sang several songs on the soundtrack in character, as musician Beverly Switzler, who was the lead vocalist for a band called Cherry Bomb . The recordings appeared on the soundtrack album and on singles . Rounding out film appearances in the late 1980s, Thompson starred in Some Kind of Wonderful, Casual Sex?, and The Wizard of Loneliness . She also had a prominent role in the 1989 TV film Nightbreaker, for which she was nominated for a CableACE Award . In the early 1990s, Thompson starred as the mother of the eponymous character in Dennis the Menace (1993), the villainess in The Beverly Hillbillies (1993), and a snooty ballet instructor in The Little Rascals (1994). She also appeared in several TV films throughout the 1990s, including The Substitute Wife (1994) and The Right To Remain Silent (1996). </P>

Who played michael j fox's mother in back to the future
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