Because right now, Credit Union 1 Amphitheatre is proud to offer tickets to see your favorite performers as they go live in one of the largest outdoor venues anywhere near Chicago. And if you act now, you can pick up tickets to see what’s coming next to their stage. This season’s biggest concerts and tours are coming to Credit Union 1 Amphitheatre, one of the hottest outdoor concert venue in Tinley Park, Illinois. Situated in the heart of Chicago's metropolitan area, it is also one of the biggest music venues in America, boasting a capacity of 28,000. The Credit Union 1 Amphitheatre, originally known as World Music Theatre and formerly Hollywood Casino Amphitheatre is one of Americas premier amphitheatres. This site links to resale tickets to events at Credit Union 1 Amphitheatre and is not the box office or venue. This site is not affiliated or sponsored by Live Nation, Ticketmaster or Credit Union 1 Amphitheatre.