Neil LaBute's Reasons to Be Happy, a companion piece to his Tony Award-nominated drama Reasons to Be Pretty, celebrated its opening night at the Lucille Lortel Theatre on Tuesday, June 11. An MCC Theater production starring Leslie Bibb, Jenna Fischer, Josh Hamilton, and Fred Weller, the show runs through June 29. Following the performance, the cast and their guests, including stage and screen favorites Julianna Margulies, Sam Rockwell, Paul Rudd, and Bobby Cannavale, headed to 49 Grove for the after party.

Check out the celebs in the photo gallery below.