Hollywood Casino Amphitheatre (originally World Music Theatre and formerly New World Music Theatre, Tweeter Center and First Midwest Bank Amphitheatre) is an outdoor music venue located in Tinley Park, Illinois that opened in 1990. It is one of the largest music venues in the Chicago area, with a capacity of up to 28,000 spectators; 11,000 reserved seats, 17,000 lawn seats. It is a venue pulling fans from the city of Chicago, as well as surrounding suburbs and neighboring states. It is one of only a few large outdoor amphitheatres in the Chicago area.