The new deal will more than double the amount of episodes the series has currently aired, reported Variety.
Harmon told GQ magazine that the 70-episode deal came after a long negotiation process.
"It was a lot of back and forth, but Justin and I just needed enough episodes and the right kind of deal structure that would give us permission to do what we want to do, which is truly focus on the show. We got all that, and we're both very excited," he said.
It is still not clear how the new episodes will be divided into season, or the timeframe for their production and broadcast.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)