Bárbara Muschietti (born 22 December 1971) is an Argentine film producer and screenwriter, best known for producing the 2013 horror film Mama and the 2017 and 2019 adaptations of Stephen King's It, all of which were directed by her younger brother, Andy Muschietti. Description above from the Wikipedia article Barbara Muschietti, licensed under CC-BY-SA, full list of contributors on Wikipedia.