If I remember, he's supposed to be very attractive and manly but just a very arrogant dick which others blindly follow. In the animated disney film all the other women are always fawning over him and the men all follow him.
...did Jensen even audition? plus I think they're going for a british cast, that and I think Jensen isn't 'perfect pretty boy' enough to be a prince. That and he's quite a bit older than Emma Watson.
O well