As it turns out, the Demogorgon isn’t portrayed by CGI – he’s played by a real man in a physical costume named Mark Steger.
“He was amazing!” star Millie Bobby Brown, 12, tells PEOPLE exclusively of the actor. “He was so great. He was this tall guy – I mean, his body movement is amazing.”
“It takes him about … How long? I thought it’d be like, five hours [to put the costume on],” says Brown.
“He has these remote control hands,” adds Schnapp.
“It’s like he’s pop-locking a little bit!” says McLaughlin with a laugh.
And while Schnapp did admit it was “scary” being on set with the Demogorgon, Brown had a more light-hearted behind-the-scenes story to tell.
“When I was doing the scene where I touched him and then I ran away … he couldn’t feel me, every time I touched him,” she explains. “So then, I’d touch him and he wouldn’t turn back and the Duffer brothers were screaming: ‘Alright Mark, Go!’ And he’s just sitting there, and he can’t hear us. So I just slapped his back and he goes: Rawr!”
“And then I was like: ‘Ew, we need to wash this,’ ” quipped Brown of her Demogorgon-slime covered hand.
A premiere date has not yet been set for Stranger Things season 2.