Glee' alums Lea Michele and Dianna Agron watched costar Darren Criss perform on Broadway. Michele joked that they were her high school classmates.

"Night out with my beautiful friend from high school," Michele captioned a post in reference to the hit musical-comedy series ...

Darren Criss played the piano ... Where the Stars of Glee Are Now In the group’s rendition of the film’s single, Criss, 32, was seen playing the piano and singing alongside Ushkowitz, 33.