•  Executive producers Shawn Levy and Dan Cohen attend the Premiere of Netflix's 'Stranger Things' at Mack Sennett Studios on July 11, 2016 in Los Angeles, California.

Executive producers Shawn Levy and Dan Cohen attend the Premiere of Netflix's 'Stranger Things' at Mack Sennett Studios on July 11, 2016 in Los Angeles, California. (Photo : Getty Images/Alberto E. Rodriguez)

Production is underway for Netflix's "Stranger Things" Season 2. Recently, director Shawn Levy offered some new details for the upcoming season.

In a Q&A with Collider, Levy confirmed that the production for "Stranger Things" Season 2 has already started in Atlanta. He added that the next season will consist of nine episodes instead of the eight episodes in Season 1.

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Levy told the publication that "Stranger Things" Season 2 has no final release date yet and stressed that viewers should not expect an early release. He stated that there is no way the second season will hit the airwaves in July 2017.

Nonetheless, Levy teased the thematic storyline of "Stranger Things" Season 2. It is said that the next season will be set in 1984, nearly a year after the shocking events of the first season.

"Stranger Things" Season 2 is expected to explore the bigger mythology of Will Byers' (Noah Schnapp) sudden disappearance. Avid viewers may recall Will vanished mysteriously after he encountered the Monster in the first season.

"Will Byers was in that Upside Down for a while," said Levy. "So Season 2 is about this determined desire to return to normalcy in Hawkins, in the Byers family, in that group of friends, and it's the struggle to reclaim normalcy and maybe the impossibility of it."

The Netflix series is also adding big names such as Paul Reiser, Sean Astin, and Linnea Berthelsen in "Stranger Things" Season 2, Variety reported. Reiser will play a Department of Energy executive, Dr. Owens, who is entrusted with containing the tragic events of the first season.

Astin will play the former schoolmate of Joyce Byers (Winona Ryder), Bob Newby, who now runs the Hawkins' Radio Shack. Lastly, Berthelsen will portray a damaged woman, Roman, who have connections to Hawkins and the research lab that started all the strange events.

Premiered on July 15, "Stranger Things" Season 1 averaged around 14.07 million adults from ages 18 to 49. It received highly positive reviews from critics because of its unique storyline and homages to 1980s genre films.

Watch Netflix's "Stranger Things" Season 1 here: