According to actor Darren Criss, Astin has been shooting with the cast.
"Me, @ChordOverstreet & @SkylarAstin... And a #DramaticSelfie for you all. So glad to have our buddy Skylar on #Glee!" Criss said Dec. 11 on his Instagram account alongside a picture of the three.
Astin, who has also been seen in the Hollywood Bowl production of Rent and is currently filming the television series "Ground Floor," is the latest Spring Awakening alum to join "Glee." The series, which stars Lea Michele, has also featured Spring Awakening vets Phoebe Strole and Jonathan Groff.