Darren Criss, who plays Blaine, the openly-gay Warbler at Dalton Academy on "Glee," is set to make an appearance as a guest mentor on the premiere episode of the series June 12.
The series will continue to air on Sunday nights at 9 PM ET. For more information on "The Glee Project," visit thegleeproject.oxygen.com.
To meet the contestants and check out the preview, look below: