Do you know the reason why there are no American actors in any of the Harry Potter movies? This is the reason why. This is the reason why J.K. Rowling included a clause in her contract with Warner Bros. regarding the casting of any actors that weren't British, and why American castings totally weren't going to happen: because they originally tried to get Robin Williams in the part of gentle giant Hagrid, which - you'll agree - would have been truly terrible. Yes, back when Harry Potter was still a thing you might not have heard of yet, Warner Bros. had their hearts set on Williams - best-known for both dramatic and comedy roles at this time, and familiar with both kids movies and kids movies featuring lots of CGI, given a recent turn in Jumanji - as the guy who should play Hagrid in the first movie adaptation. Rowling, presumably disturbed by this notion, nipped it in the bud before it was too late. Nice one, J.K..