'The Glee Project' Enlists Dianna Agron, Grant Gustin as Mentors

Agron, who plays the Yale-bound Quinn, will make her debut on the Oxygen reality competition on the Aug. 7 episode, which will feature a new theme: “Actability.”

For his part, Gustin — a recurring player as Dalton Academy Warbler Sebastian — will also make his debut on the Oxygen series, whose winner receives a seven-episode arc on Glee, in the July 17 “Theatricality” hour.