Kristen Bell has revealed that she dyed her hair dark to help her look more “bad” in Burlesque.

The actress, who starred with Christina Aguilera and Cher in the movie, said that the producers asked her to colour her hair darker because she didn’t look evil enough for the role when she was blonde.

Bell told the Daily Mail: “I’m a blonde girl who goes dark to go bad. They felt my character should be brunette and bad.”

Talking about her character, she said: “I’m the girl who feels threatened by Christina. It was make-believe – I just pretended to make Christina’s life a misery.”

Credit: Digital Spy