Keep in mind this is a mock biopic, more along the lines of "Walk Hard: The Dewey Cox Story" than "Walk The Line." I suspect that some of the casting is intentionally unusual.It's not even that I see him as Harry Potter. I've seen him in other things, like Miracle Workers, so I'm past the Harry Potter stage for him. I just don't picture him physically as Weird Al. Plus, well he's British, and I haven't seen him do an American accent, so not sure how he'll do with that.