The cast of "Heroes" would love to complete their gang! Please indulge them. Katie, i'm sure would adore it if the boys (and girls!) of "Supernatural" would come join her. Chris would appreciate someone to annoy. Mainly Scarlett, Jessica (Biel and Alba!), Ioan, Hugh, Keanu...and whoever else can stand his presence. Jon may or may not want...Hillary Clinton. You'll have to ask him.
But otherwise, if the role isn't taken, just pick a celeb and JOIN!