The filming of the sixth season of "Glee" will reportedly start next month, according to the series' cast Chord Overstreet.

The writers are already hard at work in writing the remaining scripts before the shooting begins. "I know the writers are three to four episodes in right now and from what I've heard, it's really fun stuff," he revealed in his latest interview with E! Online.

Chord Overstreet confirmed that he will be back in every episode for the final season of the hit TV series. "I assume I will be in all of the episodes. I know I am back in Ohio at the school," he said.

He also said that the final season of the series will be composed of 13 episodes. The actor also confirmed that majority of the cast will be back in the location of season 6 – McKinley High in Ohio.

Previous spoilers already hinted who will be coming back in the final run of the hit TV musical. Lea Michele (Rachel) and Chris Colfer (Kurt) will definitely return next season. Darren Criss (Blaine) and Jane Lynch (Sue) were also reported to join the cast next season.

Previous reports said that Naya Rivera (Santana) will appear in a few episodes as well as Heather Morris (Brittany), Dianna Agron (Quinn), Matthew Morrison (Will), Amber Riley (Mercedes), Mark Salling (Puck), and Jenna Ushkowitz (Tina).

The old characters will be joined by new cast. TV Line reported that the series will add five new characters in the mix that will play the new batch of New Directioners in McKinley High, although no official cast announcement has been made yet. The new cast is consisted of Roderick, Spencer, Jane, Mason and Madison.

Next season, viewers can expect a time jump and all of the characters will come back to the place where it all started – McKinley High School. Show creator Ryan Murphy welcomed everyone who wanted to come back for the series' final season.

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