“It is really scary,” Jack Dylan Grazer, who plays Eddie Kaspbrak in the film, told Inside Edition.
“Mix between traumatizing and awesome,” added Chosen Jacobs, who portrays Mike Hanlon.
The ensemble cast of kids, which includes Stranger Things star Finn Wolfhard, has formed quite a bond and enjoy skateboarding and playing the piano while creating their own horror theme music.
They've also been known to pull pranks on each other.
Jeremy Ray Taylor, 14, says he doesn't even watch horror movies and had his doubts about watching the R-rated film.
“I was actually having second thoughts about going to see the premiere,” he admitted.
“It will scare a lot of people in a lot of ways," actor Wyatt Oleff added.
Actress Sophia Lillis, who portrays Beverly Marsh in It, says Pennywise the Clown will terrify audiences.
The cast hit the red carpet for the film’s premiere last Wednesday in Los Angeles. There, the young stars arrived in a school bus and were all dressed up as faceless ghouls wearing raincoats and holding red balloons.
Bill Skarsgard, the son of Good Will Hunting actor Stellan Skarsgard and brother of True Blood actor Alexander Skarsgard, plays Pennywise.
“I haven’t seen it with a big audience like this so I’m really excited to get in there,” he said on the red carpet. “I was never one of those kids or people who was afraid of clowns.”
It hits theaters nationwide on Friday.