Natalie Portman is a self-confessed "scheming b***h".
The 26-year-old actress revealed she can be extremely ruthless when going after the film roles she wants.
She said: "I'm actually a scheming b***h!"
However, her 'The Other Boleyn Girl' co-star Scarlett Johansson disagreed, and insists Natalie is simply ambitious.
She laughed: "I don't think you're that kind of a person. You're just healthily ambitious!"
American stars Natalie and Scarlett, who play Anne Boleyn and Mary, Queen of Scots respectively, also revealed the hardest part about the film was conquering a British accent.
Natalie said: "That was a big challenge. One of the biggest challenges, personally. It totally takes me out of a movie when I hear British actors doing a bad American accent. It's a scary thing. I can't improvise with an accent at all!"
Scarlett added to USA Today newspaper: "I wanted to nail the accent early so it's not something I thought about when I was working. I've spent a lot of time in London and have family there, so that was helpful for me. It's definitely a hurdle though."
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