When show creator Ryan Murphy said that everyone is invited to come back for the sixth and final season of musical TV show "Glee," people are expecting to see a reunion of all the beloved former members of New Directions.

E! News reported that Jenna Ushkowitz, Jayma Mays, Mark Salling and Dianna Agron are confirmed to return in the final run of "Glee." Dianna Agron, herself, hinted that she will come back on the FOX's most-loved TV show. Agron paid Capitals Records a visit and tweeted a photo of her signing the studio's visitors' log.

Unnamed sources claim that the aforementioned stars will appear as guest stars in the 13-episode season 6. Jenna will start shooting within the next two weeks, and Mark and Dianna are set to jump aboard this month. Jayma's filming schedule is still unknown. However, there is no word yet if all of the former members of the New Directioners will be gathered in one episode.

Next season, Rachel will face a challenge when she goes back to her alma mater. She learned that the Sue Sylvester (Jane Lynch) banished all forms of arts in McKinley High. However, Rachel will bravely "reinstate" the glee club.

Joining the ranks of the series regulars are Kurt (Chris Colfer), Sam Evans (Chord Overstreet) and Will Schuester (Matthew Morrison) who will be back in Ohio and will find new gigs in town. Meanwhile, Heather Morris (Brittany), Dianna Agron (Quinn), Matthew Morrison (Will), Amber Riley (Mercedes), Mark Salling (Puck), Jenna Ushkowitz (Tina), and Naya Rivera (Santana) will appear in some of the episodes as guest stars.

New characters have also been reported to join the cast. According to TV Line, five new characters will be added in the season's line up although no official announcement has been made yet. The new cast is consisted of Roderick, Spencer, Jane, Mason, and Madison.

"Glee" season 6 will be back on air in the spring of 2015.