It is already a resounding success, both critically and commercially, so it's no surprise that the studio and filmmakers are already looking ahead to the sequel.
Of course, the plan was always for It was to have a second chapter, which is echoed in the final scene of the film, labeled as "Chapter One." The writers split Stephen King's novel in half, telling the first film focusing on the kids' story, and the planned sequel depicting their second encounter with Pennywise as adults.
Director Andy Muschietti (Mama) explained to Entertainment Weekly that the kids from Chapter One will return in the sequel, and shown concurrently with their adult counterparts. “On the second movie, that dialogue between timelines will be more present,” he said. “If we’re telling the story of adults, we are going to have flashbacks that take us back to the ‘80s and inform the story in the present day.”
“My idea of Mike in the second movie is quite darker from the book,” the filmmaker revealed, referring to the kid who doesn't escape from Pennywise. “I want to make his character the one pivotal character who brings them all together, but staying in Derry took a toll with him. I want him to be a junkie actually. A librarian junkie. When the second movie starts, he’s a wreck.”
“He’s not just the collector of knowledge of what Pennywise has been doing in Derry." Muschiettie continued. "He will bear the role of trying to figure out how to defeat him. The only way he can do that is to take drugs and alter his mind.”
Barbara Muschietti, the director’s sister and producing partner, is hoping to get the ball rolling soon with It: Chapter Two, as the child actors aren't getting any younger.
Based on Stephen King’s classic novel of the same name, It stars Bill Skarsgård as Pennywise, Finn Wolfhard, Jaeden Lieberher, Jeremy Ray Taylor, Sophia Lillis, Jack Dylan Grazer, Chosen Jacobs, Wyatt Oleff, Nicholas Hamilton, Owen Teague and Logan Thompson.