Tron: Legacy (stylized as TRON: Legacy) is a 2010 American science fiction action film directed by Joseph Kosinski from a screenplay written by Adam Horowitz and Edward Kitsis, based on a story by Horowitz, Kitsis, Brian Klugman and Lee Sternthal. It is a sequel to the 1982 film Tron, whose director Steven Lisberger returned to produce. The cast includes Jeff Bridges and Bruce Boxleitner reprising their roles as Kevin Flynn and Alan Bradley, respectively, as well as Garrett Hedlund, Olivia Wilde, and Michael Sheen. The story follows Flynn's son Sam, who responds to a message from his long-lost father and is transported into a virtual reality called the Grid, where Sam, his father and the algorithm Quorra, stop the malevolent program CLU from invading the human world.