The final season of
will comprise 13 uninterrupted episodes.
Glee creator Ryan Murphy announced in October 2013 that the sixth season would be the show's last, according to The Hollywood Reporter.
Production sources said that Fox has decided to give Glee a limited 13-episode final order after several months of discussions with Murphy and production company 20th Century Fox Television.
Murphy recently revealed that season six will move the emphasis back to William McKinley High School, with characters from the past likely to return.
There were reports earlier this week that Naya Rivera will likely be a recurring guest star for the final run, rather than a series regular.
Chris Colfer was recently forced to deny that he had been "let go" from Glee after a hacker posted erroneous information on his Twitter account.
Fox is expected to premiere the final season of Glee in 2015.