I just got back from seeing the movie today and I don't care what half of you guys say, the skinny 150lb actor who probably spent 3 months preparing for the roll physically was jacked. I would guess he came in about 185lbs, but once again w/out an ounce of bodyfat. No one puts on that much solid muscle mass w/out some type of fat gain with it. It's impossible...unless of course your injecting the good stuff. His traps/chest tell all. Any non-believers, go watch the movie, you'll see for yourself. He likely had a personal trainer with him all day every day preparing his meals and workouts, but that alone isn't enough to transform yourself that much in 3 months.