It's back to the sewers for HBO Max, as Pennywise returns in the IT prequel series, IT: Welcome to Derry. Per the network, the show is "set in the world of Stephen King's 'IT' universe" and is "based on King's 'IT' novel and expands the vision established by filmmaker Andy Muschietti in the feature films 'IT' and 'IT Chapter Two.'" It debuts October 26 on HBO Max, with a cast including Jovan Adepo, Taylour Paige, Chris Chalk, James Remar, Stephen Rider, Madeleine Stowe, Rudy Mancuso, and Bill Skarsgård as Pennywise.