'Stranger Things 4' Has ‘Begun Filming’ And Fans Have Spotted A Clue About Hopper

Warning: The article contains spoilers about Stranger Things Season 3.

"They're currently filming behind my brother's house on E 9th," they added.

While none of the cast were to be seen, there were a ton of give aways it could be the set of the sci-fi, between trailers, crew members and a ton of 80s-style cars.

One brown and beige 4x4 was a particular point of interest, with many fans saying it's Chief Hopper's car.

Fans who are up-to-date with the series will know that it ended with Hopper sacrificing his life to save humanity.

Joyce cried, Eleven cried, we all cried - but a teaser after the final credits saw the Russians refer to 'the American' and we all found hope he's still alive.

Now, this possible sighting of his car for the upcoming series could give us refreshed hope he's coming back.

"That's definitely Hopper's Chevy Blazer!," wrote one excited Reddit user, but others were less convinced.

"Doesn't mean Hopper's still alive, just means the Blazer was neither atHop's cabin or Starcourt on the 4th," said other.

If you remember, Hopper's car was last seen in season three when the police chief, Joyce and Russian engineer Alexi failed to restart it after it was shot at by the Russian agent.

While the car on set looks exactly like Hopper's, it's missing its police lights on top and the sticker on the side, so there's potential - as much as we don't want to admit it - that the vehicle could just a similar one.

"The blazer got burnt to a crisp. So, I imagine this will be from a flashback maybe? Especially since there's no lights or markings, maybe it'll be something about his life before being Chief," suggested another viewer.

Either way, this is all very exciting.

Netflix confirmed it had renewed Stranger Things for a fourth season in September with a short teaser, baring the cryptic words 'We're not in Hawkins anymore'.

At the time, show-runners The Duffer Brothers said: "We are absolutely thrilled to continue our relationship with Netflix. Ted Sarandos, Cindy Holland, Brian Wright, and Matt Thunell took a huge chance on us and our show - and forever changed our lives.

"From our first pitch meeting to the release of Stranger Things 3, the entire team at Netflix has been nothing short of sensational, providing us with the kind of support, guidance, and creative freedom we always dreamed about.

"We can't wait to tell many more stories together - beginning, of course, with a return trip to Hawkins!"