Attention studios: are you looking for a bargain movie star? How about Kristen Stewart or Robert Pattinson or even -- yes -- Johnny Depp or Meryl Streep? While these names aren't usually associated with with the word "cheap," they are now, thanks to Forbes' Best Actors for the Buck countdown. To compile the list, Forbes added up movie stars's salaries from their last three non-animated films, then compared that with the total operating income from each of those movies. The result is how much the studio makes for ever dollar the actor gets paid. So, who's the biggest bargain?