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

From William McKinley High to the Great White Way, the 'Glee' bond runs deep! Lea Michele and Dianna Agron visited Darren ...

Lea Michele and Dianna Agron had a mini cast reunion to support Darren Criss amid his Broadway stint in the musical Maybe ...

Amber Riley unfollows Dianna Agron and Darren Criss after they reunite with Lea Michele, sparking fan speculation.

Lea Michele is reuniting with 'Glee' costars Dianna Agron and Darren Criss to cheer him on in his new Broadway musical 'Maybe Happy Ending.' ...

Completely & utterly heartwarming all around - another huge round of applause for you, Darren." Michele's Rachel, Agron's Quinn, and Criss' Blaine were part of ... said he continues to appreciate Glee ...

Are Darren and Dianna the only ones who don ... where things really stand between her and the rest of the Glee cast — and whether Criss and Agron are the last two still in her corner.

Lea Michele is reuniting with 'Glee' costars Dianna Agron and Darren Criss to cheer him on in his new Broadway musical 'Maybe Happy Ending.' ...