What cinematic universe includes the characters Pennywise, the Losers, and the city of Derry?

These characters belong to the Stephen King universe, specifically to the 'It' story. Pennywise is the evil entity that takes the form of a clown, the Losers are the group of children who confront him, and Derry is the fictional Maine town where the events occur. Although 'It' has its own adaptations, it is part of King's interconnected universe, where many of his stories share locations, references and sometimes characters.