Transformers is a 2007 live-action film adaptation of the Transformers franchise, directed by Michael Bay and written by Roberto Orci and Alex Kurtzman. It stars Shia LaBeouf as Sam Witwicky, a teenager involved in a war between the heroic Autobots and the evil Decepticons, two factions of alien robots who can disguise themselves by transforming into everyday machinery. The Decepticons desire control of the All Spark, the object that created their robotic race, with the intention of using it to build an army by giving life to the machines of Earth. Megan Fox, Josh Duhamel, Tyrese Gibson, Jon Voight and John Turturro also star, while Peter Cullen and Hugo Weaving provide the voices of Optimus Prime and Megatron respectively.

Producers Don Murphy and Tom DeSanto developed the project in 2003, with a treatment written by DeSanto. Executive producer Steven Spielberg came on board the following year, and hired Orci, Kurtzman and Bay for the project in 2005. The filmmakers wanted a realistic depiction of the story, and created a complex design aesthetic for the robots to stress their alien nature. The computer-generated characters were programmed to have thousands of mechanical pieces move as they transformed and maneuvered. The United States Military and General Motors lent vehicles and aircraft during filming, which saved money for the production and added realism to the battle scenes.

Hasbro organized an enormous promotional campaign for the film, making deals with hundreds of companies. This advertising blitz included a viral marketing campaign, coordinated releases of Transformers prequel comics books, Transformers toys and books, as well as product placement deals with GM and eBay. The film was a box office success despite mixed fan reaction to the radical redesigns of the characters, and reviews criticizing the focus on the humans at the expense of the robots. It is the thirtieth most successful film released and the fifth most successful of 2007, grossing approximately US$708 million worldwide. The film won four awards from the Visual Effects Society and was nominated for three Academy Awards. It revitalized media interest in the franchise, and a sequel Transformers: Revenge of the Fallen is expected for release on June 26, 2009.