Sometimes, Hollywood Casting Confounds Me

Why does Hollywood feel the need to cast some actors in big movies, regardless as to weather or not the actor is any good or appropriate for the role?

Case in point, Jake Gyllenhaal as Prince Dastan in the upcoming Prince of Persia movie. Yeah, someone explain this to me. Pink is the New Blog has the story and some interesting pictures of a typically confused Gyllenhaal here. 

~Lauren