The touring production of the Broadway hit “Wicked” previews today and opens Thursday evening at the Kentucky Center. The Tony and Grammy Award-winning musical depicts "The Wizard of Oz" characters Elphaba (the Wicked Witch of the West) and Glinda the Good as schoolgirls in an oppressive political regime.Performances of “Wicked” often sell out, but a limited number of steeply discounted orchestra-level tickets will be placed on sale the day of each performance.“Two and a half hours before the show begins, show up in the lobby at the Kentucky Center. You’ll put your name into a drum. Thirty minutes later the drawing will be done," says Broadway in Louisville spokesperson Matthew Porter. "If your name is drawn you’ll be able to go to the box office and purchase front orchestra seats." Those lottery seats will cost $25 for seats that usually sell for $87.75 (cash only, limit two tickets). “Wicked” previews today and opens Thursday evening at the Kentucky Center. The show runs through September 30."Wicked" fans who aspire to the stage will have an opportunity to take a master class in dance or vocal audition from members of the cast. The classes will be taught by members of the ensemble, those cast members who cover several different roles during the course of a show.“What you can expect is to learn from real touring professionals what it takes to be in a big touring Broadway show," says Broadway in Louisville spokesperson Matthew Porter.The master classes will be held on Saturday, September 22, 10 a.m.-noon, at St. Stephens United Church of Christ on Farnsley Road. The class costs $30 and is open to performers ages 10 and up. Proceeds from the class benefit HIV/AIDS charity Broadway Cares/Equity Fights AIDS. For more information, contact the Sutton Studio for the Performing Arts at (502) 594-2746.