Helena Bonham Carter confirmed to Scifi.com that she will indeed be playing a bad guy/woman in Terminator Salvation.

“I kind of play a baddie, definitely a baddie,” Bonham Carter said, “I don’t know how much I’m allowed to say, but I’m a very bad person.”

Bonham Carter is a new addition to the cast of the film, which already includes Christian Bale, Sam Worthington, Anton Yelchin and Bryce Dallas Howard.

Bonham Carter (Sweeney Todd) replaced Tilda Swinton at the 11th hour and will work a total of about 10 days on the film, which is currently in production in New Mexico.

“Tim [Burton] would have killed me if I hadn’t done it, because he’s such a Terminator fan,” Bonham Carter said, referring to her longtime partner and director on such films as Planet of the Apes. “I’ve been in big movies before, like Apes, and Fight Club was big in a different way, and Charlie [and the Chocolate Factory] and Sweeney Todd were big, but I’ve never been in this kind of big popcorn action movie, a male one, an action one.”

It’s interesting that she replaced Tilda Swinton. The producers must have been keen on having the evil woman have an English accent. Carter will be playing Serena in the movie and will have a small but hugely important role part in the first film.