The show must go on.

Glee's Matthew Morrison (also known on the small screen as William Schuester) took the stage at 54 Below in Manhattan this afternoon for an encore engagement of Up Close and Personal with Matthew Morrison, his first performance following his costar Cory Monteith's death.

Like many others, Morrison was stunned by the tragic news, but decided to continue with the show and dedicate the performance to his late "brother."

"Matthew changed the concert set last night. He came out before the show to speak to the audience," a source tells E! News. "He talked about Cory for a couple minutes, about how hard it is for him and his cast right now. That as much as he played his teacher on television, he was more Iike his brother."