Arnold Schwarzenegger

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.