Watch The Terrifying First Trailer For Stephen King's It

The first trailer for the big screen adaptation of Stephen King's It has arrived. The horror movie releases in September, and this first teaser delivers the terrifying goods. Check it out below--but be warned, scary clowns lie ahead!

The film's young cast includes Stranger Things star Finn Wolfhard, Jaeden Lieberhe (Midnight Special), Sophia Lillis (37), Wyatt Oleff (Guardians of the Galaxy), and Chosen Jacobs (Hawaii Five-0). It also features Bill Skarsgard as the demonic clown Pennywise.

King's classic novel was published in 1987. The author recently revealed he had seen the film and was very happy with it. He tweeted:

As King notes, the movie is expected to be the first of two films--in the novel, a group of kids overcome their fears to eventually defeat the creature known as It. Years later he returns, and as adults they must work together to finish the job. The first movie will be about the children's story, while a second will chronicle the adults' narrative.

In a new interview with USA Today, director Andrés Muschietti spoke about the terrifying clown Pennywise. "It's established that Pennywise takes the shape of your worst fear," he said. “He doesn't have a steady behavior, he doesn't expose how he thinks, and that's what makes him really unpredictable.

"Pennywise's character is motivated by survival. In order to be alive in the imagination of children, he has to keep killing."

It hits theaters on September 8, 2017.