Pitt

“It’s very difficult to cast a movie star as an ordinary person, and Brad can really only play extraordinary people. The other thing about Brad is he’s someone you never really feel like you know on screen. I don’t think, in any movie of his I’ve ever seen, I’ve identified with him, in the sense that he retains that sort of essential mystery like those old-time movie stars where you don’t really feel like you know him. And that seemed to be a really good thing for Jesse.”

from this interview with Assassination of Jesse James director Andrew Dominik.