Arnold Schwarzenegger has been forced to back out of starring in the remake of sci-fi thriller WESTWORLD, because he's too busy with his role as California Governor.

Schwarzenegger had planned to co-produce and appear in the movie, but it was all put aside after he walked away from California's 2003 gubernatorial election victorious.

And now the production is going ahead without the TERMINATOR star, after Tarsem Singh, who directed Jennifer Lopez's critically panned 2000 thriller The Cell, was named as director.

Schwarzenegger has not held any discussions about involvement with the film, according to his representative SHERYL MAIN, who adds, "It's not even on the governor's radar right now. He's concentrating on the special election that's coming up in November. That is not even a blip on the screen."