Ben Stiller has not been shying away from his Twitter and Instagram pages as Zoolander 2 continues production. Last week, the director/star revealed that Cyrus Arnold is playing his son, Derek Jr., while also confirming that actress Penélope Cruz has joined the cast. The actor/director took to both his Twitter and Instagram pages today, to reveal that Billy Zane will be coming back for the sequel.Billy Zane had an uncredited role in the original 2001 comedy Zoolander as himself, a good friend to male model extraordinaire Derek Zoolander (Ben Stiller).