Fairly simple game, I used to play it at college when we were bored. I start by suggesting a movie, the next person has to name and actor or actress that is in that movie, then state another movie they have been in. The next person must then pick differant acotr / actress from the second movie and do the same... you get the picture?
If you get really stuck, you can use TV shows, but they have to have played a fictional character!
The first movie is... The Terminator