"One takes after Angie and one after Brad, they are really amazing. But the twins are very distinct, they really are themselves. The boy is very quiet. He has this calming, relaxed personality that Brad has and the girl, well she's just stunning like Angelina. Just beautiful." JON VOIGHT is a proud grandfather to twins KNOX and VIVIENNE, his daughter ANGELINA JOLIE's youngest children with BRAD PITT.