Accoring to Forbes...

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These are the actors & actresses who bring in the most money per movie:

1. Matt Damon
2. Brad Pitt
3. Vince Vaughn & Johnny Depp
5. Jennifer Aniston
6. Angelina Jolie
7. Renee Zellweger
8. Reese Witherspoon
9. Ben Stiller
10. Sandra Bullock

"According to Forbes' first-ever list of Ultimate Star Payback, the movie stars who deliver the best bang for the buck aren't the industry's top earners. Matt Damon, the soft-spoken leading man in box office winner The Bourne Ultimatum, turns out to be Hollywood's best investment. For every dollar Damon got paid for his last three roles, his films returned $29 of gross income. And, surprisingly, former Friends star Jennifer Aniston is Hollywood's most profitable actress, despite duds like Rumor Has It. For ever dollar the former Mrs. Pitt was paid for her last three major roles, her films on average returned $17 of gross income."