Natalie Portman and Mila Kunis say Black Swan director Darren Aronofsky tried to stoke a feud between them while on set in order to mimic their on-screen rivalry.

On Aug. 21 and 24, Darren Aronofsky 's ballet–psychological thriller Black Swan, starring Natalie Portman and Mila Kunis, is back in theaters in a newly remastered version playing on Imax screens across the country.

Darren Aronofsky recalled unsuccessfully trying to start a feud between Natalie Portman and Mila Kunis to ramp up the onscreen tension in 'Black Swan': 'They're both very clever and were instantly privy.