Arnold Schwarzenegger could make a cameo appearance in a fourth Terminator movie, according to Empire.

Metro Goldwyn Mayer chairman Harry Sloan says that he expects the actor-turned-politician to take a small role in the film, which is to be directed by Terminator 3: Rise Of The Machines director Jonathan Mostow.

Schwarzenegger, who was elected Governor of California in 2003, reportedly agreed to cameo in a fourth instalment in the action movie series as part of his contract for Rise Of The Machines.

Terminator 4 will begin filming soon for a 2008 release.