Benedict Clarke was all right, but I cannot buy his nose at all. He doesn't look like the urchin I see in my head in the Prince's Tale, IOW. But I suppose I could believe that he would grow up into Alec Hopkins who in turn would maybe grow up into Alan Rickman, in a sense. They were pretty good at getting that consistent, at least, with the young characters - the teenage Marauders are an atrocity (IMO) but I can totally believe boys who looked like that would grow up to look like the adults we see portrayed by Thewlis, Oldman, Spall and I-can-never-remember-the-name-of-the-bloke-who-plays-James-who-cares-anyway.