Chris Colfe as Riff Raff

As Glee gets closer to its highly anticipated tribute to The Rocky Horror Picture Show, some of the chracters the cast will be playing is set: Finn (Cory Monteith) and Rachel (Lea Michele) will play newlyweds Brad and Janet, Kurt (Chris Colfe) will be ghoulish butler Riff Raff, Sam (Chord Overstreet) will play Rocky and Dr. Carl (John Stamos) will take over the role of Eddie – originally played by Meat Loaf. Quinn (Dianna Agron) will play two roles – as maid Magenta and a Time Warp dancer (Santana (Naya Rivera) will also reportedly play Magenta), and Mercedes (Amber Riley) will portray Frank-N-Furter. The episode airs Oct. 26.