Neville Longbottom is all grown up and JK Rowling has something to say about it. Actor Matthew Lewis is best known for his portrayal of Gryffindor dork Neville Longbottom in the "Harry Potter" movies. The much-beloved character was babied by his grandmother and terrified of potions-master Professor Snape. But in this month's cover feature for Attitude Magazine, Lewis seems like a different person.