VIDEO : Natalie Portman Talks About On-Set Rivalry While Shooting 'Black Swan'

While doing press for her directorial debut, 'A Tale of Love & Darkness,' Natalie Portman opened u about Darren Aronofsky's directorial style on 'Black Swan.' Portman recently told Vogue that she was pitted against co-star Mila Kunis, saying quote, ?Darren would tell us things about each other to try to make us jealous. I think he was trying to create a rivalry in real life between us.