Transformers is a 2007 American science fiction action film based on Hasbro's toy line of the same name. Directed by Michael Bay from a screenplay by Roberto Orci and Alex Kurtzman, it is the first installment of the Transformers film series. The film stars Shia LaBeouf as Sam Witwicky, a teenager who gets caught up in a war between the heroic Autobots and the evil Decepticons, two factions of shape-shifting alien robots. The Autobots and Decepticons both seek a powerful artifact called the AllSpark, to win the war that has devastated their home planet of Cybertron. Tyrese Gibson, Josh Duhamel, Anthony Anderson, Megan Fox, Rachael Taylor, John Turturro, and Jon Voight also star, while Peter Cullen and Hugo Weaving voice Optimus Prime and Megatron, respectively.