Tonight marks the start of the Fall Broadway season.
Tonight, the celebrities were out for the opening night of the play "This Is Our Youth."
It's set in a New York apartment in the 1980s and stars Michael Cera, Kieran Culkin and Tavi Gevinson.
The original play was on Broadway in 1996 and was written by playwright Kenneth Lonergan wrote the play.
The show runs for 20 weeks only.