The Theatre Development Fund's TKTS is a great way to purchase discounted theatre tickets, with locations in Times Square, South Street Seaport and Downtown Brooklyn. Click here for more information.

Here is a selection of Broadway and Off-Broadway shows currently on sale at TKTS for tonight's performances. Best be quick!

1. Side Show's official Broadway opening night! 50% off

2. Still the longest-running show on Broadway ever, and for a good reason, The Phantom of the Opera: 50% off

3. A Delicate Balance starring Glenn Close and John Lithgow: 40% off 4. The Broadway Chicago revival just celebrated 18 years of performances: 50% off

. Critically acclaimed This Is Our Youth starring Michael Cera, Kieran Culkin and Tavi Gevinson: 50% off

. Mamma Mia! is always guaranteed to be a fun night of singing and dancing: 50% off

. Get your Bon Jovi fix early in the week with Rock of Ages: 50% off

. Sharp and funny satire in the ever-popular Avenue Q: 40% off

. Choose your own adventure tonight with Blank! The Musical: 50% off

. Now a cult sensation, Blue Man Group's Tubes: 50% off