Unscripted moment in 'Stranger Things' that made it into the finale revealed

Winona Ryder and David Harbour's kiss on Stranger Things was not scripted.

The 50-year-old actress and the 47-year-old actor's alter-egos Joyce Byer and Jim Hopper shared a steamy planned first kiss earlier in season four but decided to add in a spontaneous second smooch in the season finale.

A message on the Stranger Things Twitter account stated: "This kiss wasn’t scripted, Winona and David added it on the day of filming."

In the scene, Joyce was struggling with flashbacks to her former boyfriend Bob's (Sean Astin) death and Hopper reassured her with a sweet kiss.

Speaking previously about the romance between their characters, David said: "The fans, they call it, like, Jopper or something. They all ship this relationship with Hopper and Joyce, and I do too because I feel like they’re two really lonely, lost people that really need each other.”

And Brett Gelman, who plays Murray Bauman, added: "I definitely ship it.

They love each other. That is all that matters. When you meet single people and they are putting together a criteria of what you want, I am like, ‘You are wasting your time and you are stressing yourself out for nothing.’”

Starring Winona Ryder, Millie Bobby Brown, Sadie Sink, Finn Wolfhard, Gaten Matarazzo, Caleb McLaughlin, David Harbour, Joe Keery, Charlie Heaton, and Natalia Dyer, season four sees the heroes of Hawkins gear up for what is sure to be an epic showdown with show’s big-bad Vecna, played by Jamie Campbell Bower.

And for those who have already devoured season four, there's some good news - it turns out Stranger Things will be back for a fifth season!

In an interview with the Happy Sad Confused podcast, the Duffer Brothers said that while the next season - set to be released sometime in 2024 won’t be as long as season four, fans can still expect a "feature-length" finale.

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"The only reason we don't expect it to be as long is because if you look at it, it's almost a two-hour ramp-up before our kids really get drawn into the supernatural mystery," Matt Duffer said. "You get to know them, you get to see them in their lives, what they're struggling with, adapting to high school, and so forth. Steve's trying to find a date, all of that. None of that obviously is going to be occurring in the first two episodes of [season five].”

"For the first time ever," he continued, "we don't wrap things up at the end of [season] four, so it's going to be moving. I don't know that it's going to be going 100 miles an hour at the start of five, but it's going to be moving pretty fast. Characters are already going to be in action. They're already going to have a goal and a drive, and I think that's going to carve out at least a couple hours and make this season feel really different."

Stranger Things Season Four: Volume One & Two are available to stream on Netflix now.