MADISON - The Wisconsin Capitol is being prepared for scenes involving the government and the FBI in the Johnny Depp gangster film "Public Enemies." Workers removed chairs from a second-floor hearing room on Thursday in preparation for filming to begin Friday and go through the night, according to a permit the state gave the movie's producers. The permit allows filming inside and outside the hearing room, in a ground floor hallway, inside a staircase and outside the Capitol near State and Wisconsin streets. Film producers also got the OK to use special effects to create a "smoke-filled" room inside the normally smoke-free Capitol, as long as it doesn't damage the building, paintings or furniture. The filming in the Capitol has to do with the FBI and government, said the film's publicist Dave Fulton. He would not say which of the film's stars would be involved in the scenes. But it appears unlikely that Depp, who plays gangster John Dillinger, would be involved. More likely are Billy Crudup, who plays FBI director J. Edgar Hoover, and Christian Bale, who stars as FBI agent Melvin Purvis. Filming will take place inside on Friday and outside next Thursday, but the timing of scenes next week may change, Fulton said. The movie is about 1930s criminals including Dillinger, whose crime spree ended when he was shot to death in Chicago by FBI agents on July 22, 1934. "Public Enemies" is directed and produced by University of Wisconsin graduate Michael Mann. Filming has taken place across Wisconsin, Illinois and Indiana since March. Upcoming scenes are planned in the 95-year-old Milwaukee County Historical Society building. Depp's presence has been the talk of the state for weeks, with fans showing up for filming in the hopes of catching a glimpse. The movie is expected to have a $20 million impact on the state's economy, and Depp has been doing his part to help out. The Hollywood star dropped a $1,500 tip at an Appleton restaurant last month after he and nine others rang up a $2,650 bill, according to the Appleton Post-Crescent. "He reached across the bar and shook hands. He shook hands with everyone on the staff," Pat Flanagan, owner of Flanagan's Wine Review restaurant, told the newspaper. "Johnny Depp is welcome here any time." (Copyright 2008 by The Associated Press. All Rights Reserved.)