A film version of popular video game Halo is being made by two Hollywood studios, its developers have confirmed.
Halo has sold more than five million copies worldwide
Universal and Fox studios are making the film, while British novelist Alex Garland has written the script.
The film will focus on Master Chief, the hero of Microsoft's Xbox version of the game, who fights to save mankind from an alien race.
It is due for release in summer 2007, although the issue date of a new version of Halo has not been announced.
Bungie, the Microsoft-owned venture which developed the game, said they had "worked out all the kinks" with the Hollywood studios and were ready to start work on the project.
Garland, best known for his novel The Beach, said that his impression of playing Halo "was often of being in a movie".
A director for the film is likely to be chosen in the next month.
Bungie have said they are looking for "someone who's as committed to the Halo universe as Peter Jackson was to Tolkien's Middle-Earth".
The Halo game, which was released in 2001, has sold in excess of five million copies around the world and spawned a sequel, which came out last year.