Harry Potter Movie Casts

We all know about Harry Potter and the actors who play the main characters, Harry, Ron, and Hermione, plus all their friends. I think many people would agree that the actors Daniel Radcliffe, Rupert Grint and Emma Watson should all stay in their roles for all seven films. I think many people whould rather have them older then their roles, then have new actors try to take on their roles. If they change the actors I beleive (from many complaints and arguements) that lots of children (or rather Teenagers who know better) would be greatly dissapointed. This petition is for those people who want Daniel Radcliffe, Rupert Grint and Emma Watson (and other main characters of course), to stay in their roles for all seven films.