Shooting has already begun on the second part of the Stephen King adaptation.
But this time around the story is set 27 years after the events of the first movie with the Losers Club all grown up.
Pennywise may have been defeated by the kids in the 1980s, but he’s back and the adults are going to have to reunite against him.
Now Skarsgard has revealed what’s changed for It Chapter 2 and the impact of the first film’s success on him.
Speaking with Collider, the 27-year-old said: “Yeah, it’s weird. It’s a bit strange ’cause it’s a very different thing now.
“The first time I did it, nobody knew what I would do with it, so it was just all of this expectation.
“I didn’t know if it would work, or if people would respond to it. There was a lot of that worry going on about it.
“But that was also cool ’cause I was just doing my thing and nobody knew what that was or could tell me how I should do it.”
He continued: “I was like, I’m gonna distance myself from the Tim Curry performance, and then come up with some weird stuff, myself. I worked really closely with Andy (Muschietti), the director.
“This time around, because the movie became such a phenomenon, it’s almost like I’m re-adapting myself.
“And now that I’m going back and doing it, it’s such a bizarre thing. I don’t think I’ll ever really experience anything like it.
“It’s this dualistic thing of me and the work and the character, and then the thing that it became, but it’s fun.”
Skarsgard added: “We had the read-through and I’ve done some rehearsals, and I was surprised how much of the character was just there already.
“I instantly could access him again, like it was yesterday that we wrapped the first one. It was just all there.
“So, the work and preparation and figuring out the character is almost intuitive, which is pretty cool.
“It’s a very strange thing, but I’m trying to enjoy the ride, as much as I can.”
It: Chapter Two will be released in UK cinemas on September 6, 2019.