Lights! Camera! Fashion!

See the stylish, sexy and outrageous costumes we spotted Dakota Fanning, Elizabeth Olsen, Reese Witherspoon and more A-listers wearing on set

NATALIE PORTMAN

Black Swan this is not! Natalie hits the Malibu, Calif., sand in a summery dress topped with a sweater and beachy waves alongside her Knight of Cups costar Christian Bale.