Pennywise is a recurring, malevolent shapeshifter in Derry that resurfaces every twenty-seven years, originating from the Macroverse and manifesting as deadly "deadlights."
How 'It: Welcome To Derry' Expands the Legend of Pennywise
Stephen King admitted uncertainty about Pennywise’s origins, leading Andy Muschietti to embrace ambiguity when developing the prequel series It: Welcome to Derry.
