There had been speculation if the show would survive the death of heartthrob Cory Monteith, who played Finn Hudson, in July.
Monteith (31) died from a drug and drink overdose.
Show creator Ryan Murphy has also revealed that the finale was originally set to focus on Finn and Rachel.
“The final year of the show, which will be next year, was designed around Rachel and Cory/Finn’s story,” he told media as he promoted is latest drama ‘American Horror Story: Coven’.
“I always knew that, I always knew how it would end. I knew what the last shot was – he was in it. I knew what the last line was – she said it to him,” he continued.
“So when a tragedy like that happens you sort of have to pause and figure out what you want to do, so we’re figuring that out now.”
But Murphy has promised fans that, despite actor Monteith’s death, the ‘Glee’ finale will be unforgettable.
“I have a good idea,” he said. “I’m going to tell the studio and the network [in a week] how after Cory’s unfortunate passing we can end the show that I think is very satisfactory. And kind of in his honor, which I love.”