As the sixth season of "Glee" approaches, fans are preparing for the groundbreaking musical series to take its final bow. But, in the meantime, Gleeks everywhere can rejoice because four more favorites from the show's original cast will be returning to the final season.

And television stars are sharing a sneak peak of the upcoming season 6 fun on Instagram.

According to E! News, Dianna Agron, Mark Salling, Jenna Ushkowitz, and Jayma Mays will all be returning to the cast of "Glee" when the show returns for its final season in 2015. The actors will be reprising their roles as Quinn, Puck, Tina, and Emma respectively.

The stars were not initially listed on FOX's roster for the season, but E! reports that all four will return as guest stars during the final 13 episode run of the series.

And the returning cast members announced their homecoming on Instagram, sharing a few glimpses into the behind-the-scenes fun.

"Back in my trailer. Back in her dresses... ," wrote Agron, who stepped back into the role of Quinn on Sept. 9.

Agron also posed with former onscreen love Salling.

And Ushkowitz posed for a sweet snap with old friend Kevin McHale.

According to E! News, Agron and Salling will begin filming for the final season this month, while Ushkowitz will begin shooting in the next two weeks. It's not yet known when Mays will return to set but "show insiders" affirm that we will definitely be seeing Emma Pillsbury in the show's last turn.

Also filling the halls of William McKinley High School will be current series regulars Lea Michele, Chris Colfer, Naya Rivera, Darren Criss, Jane Lynch, Matthew Morrison, Chord Overstreet, Amber Riley, Kevin McHale, and Dot-Marie Jones.