'Glee' Season 6 Sneak Peek: Brittany's Back, Other Cast Members Set to Return

Guess who's back?

"Glee" stars Heather Morris and Lea Michele shared a quick sneak peek at the upcoming sixth and final season of "Glee" today with a behind the scenes pic on Instagram.

In the pic, Morris and Michele are in costume as Rachel Berry and Brittany S. Pierce, and they look to be checking out books in the McKinley High School library!

From what we know of the upcoming season, Rachel is heading back to McKinley to work with the glee club and hopefully salvage their Nationals chances after her failed attempt at a Broadway career.

More good news for fans of the original "Glee" cast: We also learned today that Dianna Agron, Mark Salling, Jenna Ushkowitz and Jayma Mays are also all set to return in some capacity for the final season.

Max Adler, who played bully-turned-good-guy Dave Karofsky, is also set for a large role in the sixth season, with rumors that he and Blaine (Darren Criss) might be a couple!

Check out the set photo from Michele and Morris below: