Arnold Schwarzenegger

His film appearances after becoming Governor California include a 3-second cameo appearance in The Rundown (a.k.a., Welcome to the Jungle) with The Rock, and the 2004 remake Around the World in 80 Days, where he appeared onscreen with action star Jackie Chan for the first time. In 2005 he appeared as himself in the film The Kid & I. Schwarzenegger voiced Baron von Steuben in Episode 24 ("Valley Forge") Liberty's Kids.
Schwarzenegger had been rumored to be appearing in Terminator Salvation as the original T-800 model, alongside Roland Kickinger. Schwarzenegger denied his involvement, but it was later revealed that although he would appear briefly he would not be shooting new footage, and his image would be inserted into the movie from stock footage the first Terminator movie.
Schwarzenegger's most recent appearance was in Sylvester Stallone's The Expendables, where he made a cameo appearance alongside Stallone and Bruce Willis.