John Astin – 91
He looks quite different now. But when John Astin starred in The Addams Family as Gomez Addams, audiences found his depiction of the role very convincing and highly entertaining. He has also found success with numerous films in his career, with his most notable performances being in West Side Story and The Frighteners.
It is said that he has been teaching at his alma mater, John Hopkins University—although that news remains unconfirmed. But he is definitely teaching something as Professor Peabody in the upcoming Starship II.