She began receiving producer credit with Spielberg on the major box-office hit E.T. the Extra-Terrestrial (1982), and continued serving the role on most of his films for the next three decades. In 1981, she helped co-found and run the production company Amblin Entertainment with Spielberg and her future husband Frank Marshall. She also produced Indiana Jones and the Temple of Doom (1984) with George Lucas and Frank Marshall, and appeared in the film's opening sequence as a dancer. Following her work on the Indiana Jones films, she rose to become one of Hollywood's leading producers. With Amblin, she produced the Back to the Future trilogy, collaborating with such directors as Martin Scorsese, Robert Zemeckis, Barry Levinson, and Clint Eastwood. She took over a large portion of running of Amblin and served as its president until 1991, when she and Marshall formed The Kennedy/Marshall Company with a deal at DreamWorks. She continued her business relationship with Spielberg and became producer for Jurassic Park (1993) and executive producer for the historical drama Schindler's List (also 1993).