Lordddddd..check out this article about EL James' opinion on casting. I think I love her.
Not that they'd EVER cast either of these two...but I actually don't think I'd mind Kstew, now that I think about it. I think she's a pretty solid match for Ana. RPattz? No way in HELL. As much as I love him...he wasn't my Edward and he sure as hell wouldn't be my Christian Grey.