Darren Criss Kicks Off 'Supergirl' Filming

Darren Criss is officially on set filming his Supergirl stint!

The 29-year-old Glee alum took to Instagram to share a bunch of behind-the-scenes photos, even snapping one with star Melissa Benoist in her costume.

PHOTOS: Check out the latest pics of Darren Criss

“First day on @supergirlcw . I’m assuming this is my seat,” Darren captioned one pic of Melissa‘s chair.

Darren will be part of the highly-anticipated Supergirl-Flash musical crossover episode.

In case you forgot, Darren, Melissa, and Grant Gustin were all part of the Glee cast!