(Crain's) — Filming of the new Superman movie, “Man of Steel,” lands in Chicago on Wednesday with two downtown buildings playing the role of the Daily Planet.

The Chicago Board of Trade's imposing Jackson Boulevard edifice will portray the exterior, sources said, while Willis Tower on South Wacker Drive will serve as the interior of the newspaper office where superhero alter ego Clark Kent works as a reporter.

Filming in Chicago is set to take place from Wednesday to Sept. 17 or 18, but few details are available. It isn't known whether any film permits have been filed for shooting scenes on streets or other public sites, and the Chicago Film Office, which handles film permits, did not return calls.

“It's super-duper secretive,” Illinois Film Office Managing Director Betsy Steinberg said. “I don't know their locations yet.”

Across South Franklin Street from Willis Tower, two trucks from Third Act Pictures Inc., the movie's production company, were parked on Tuesday afternoon.

Warner Bros. is keeping an extremely tight lid on publicity for the restart of the Superman saga, still referring to the filming under way by its codename, “Autumn Frost.” The film starts Henry Cavill as Superman/Clark Kent; Russell Crowe as Jor-El, his father on Krypton, and Kevin Costner and Diane Lane as Pa and Ma Kent, Superman's adoptive parents on Earth.

Zack Snyder, director of “300” and “Sucker Punch,” is directing “Man of Steel,” which reportedly has a budget of $175 million and is expected to hit theaters in summer 2013.

About a month's worth of shooting finished last week in and around far west suburban Plano, which portrays Smallville, the rural town in which Superman grew up. After the production wraps up in Chicago, much of the film will be shot in Vancouver.