Guess who's back at McKinley...! Not just Rachel (Lea Michele) and Kurt (Chris Colfer), but Mercedes (Amber Riley) too!

Here's one of Amber's latest tweets:

"Ebony and Ivory! So glad to be back with my babies! @chriscolfer @msleamichele"

Of course in the last photo, you can guess where Kurt and Rachel are. So does this mean Mercedes will be back at McKinley soon too?

Check out these Glee season 4 behind-the-scenes photos via Twitter, in our gallery right here: