For her role, Portman, who is married to dancer-choreographer Benjamin Millepied, got a makeover to go from brunette to blonde. "Natalie makes a beautiful blonde!" colorist Tracie Cunningham told Us Weekly. "She needed to make the change for an upcoming movie role, and using Redken's Blonde Dimensions we achieved a gorgeous, multi-dimensional golden blonde."
The film is also set to star Ryan Gosling, Rooney Mara, Christian Bale and Cate Blanchett. And it looks like Gosling, 31, and Mara, 27, will also have a romance in the film. On Sept. 25, the young Hollywood stars were photographed shooting a kissing scene!