wow, cool thanks for that! i really hope they continue to do the series for all 7 films because nobody could ever replace them and do as well. i definitely think they will do the fifth film-after that who knows? i think they will though because they've all said it'd be weird to have someone else play their parts. I don't think it would be a problem to have them play characters younger than they are-they still will look young enough to play 17 in their early 20s. i really hope they stay on!!