FIRST LOOK: Angelina Jolie Goes Undercover In 'Salt'

Angelina Jolie begins work today on "Salt," in which she plays a rogue CIA operative trying to clear her name after being accused of working for the Russians. Sony has released two photos of her in character, seen below.

USA Today reports:

Among the many different looks she has in the film are a soft-looking, all-business blonde and a raven-haired femme fatale who easily could be concealing a dagger or a gun.

Which is the real Salt? That's what filmmakers say is the central mystery.

"She's a character you never know," says Lorenzo di Bonaventura, who also produced Transformers and the upcoming G.I. Joe. "People who think they know the real her may or may not. Those who think they can tell whether she's in a disguise also may or may not.

PHOTOS OF JOLIE UNDERCOVER (RELEASED BY SONY):

The film was initially intended for Tom Cruise

Liev Schreiber has signed on to costar.

Jolie has been in New York with her kids preparing to film

The Jolie-Pitts were reported to have rented a Long Island estate Sassafras during filming.