Thewlis has at least two more Harry Potter films coming, a prospect that fills him with almost childlike glee. "I'm really glad I'm going to see everybody again, and it'll be weird to see the kids grown up. I'm not sure how they're going to make the other films, it would be a shame not to have the same actors, but Rupert [Grint, playing ginger Ron] is going to be married with kids or something by the end."