Who directed the film that has a character acted by  Bill Istvan Günther Skarsgård and is based on the 1986 novel of the same name by Stephen King?
Bill Skarsgård: Bill Istvan Günther Skarsgård (born 9 August 1990) is a Swedish actor and model, known for his roles in "Simple Simon", "Hemlock Grove", "Atomic Blonde" and Pennywise the Dancing Clown in the 2017 film "It". It (2017 film): It: Chapter One, or simply It, is a 2017 American supernatural horror film directed by Andy Muschietti, based on the 1986 novel of the same name by Stephen King.
Andy Muschietti