Fox has confirmed that seasons five and six will definitely be happening, reported E! News.
Ryan Murphy's show has been a huge hit since its debut and its fourth season bagged 8.7 million viewers, with a 3.6 rating in the all-important 18-49 demographic.
In a statement, Murphy said, "I am very grateful to Kevin (Reilly), Dana (Walden) and Gary (Newman) for their incredible support of this series from the beginning," Murphy said in a statement.
"But I also want to thank our loyal audience, whose passion and enthusiasm continue to amaze and inspire us."