USA Today has revealed the first two photos of Angelina Jolie on the

Columbia Pictures set of Salt, directed by Phillip Noyce.

UPDATE: A new image of Angelina Jolie from this film has surfaced online. Take a look at the new image below.

Starring Angelina Jolie, Liev Schreiber and Chiwetel Ejiofor, the story centers on Evelyn Salt (Jolie), a CIA officer who is fingered as a Russian sleeper spy. She eludes capture by superiors who are convinced she is out to assassinate the president. While trying to reunite with her family, she struggles to prove someone else is the traitor.

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.

"You're supposed to be kept guessing. She tells you her agenda, but are you supposed to believe it?"