Kate Siegel is an American actress and screenwriter. She is best known for her collaborations with her husband, filmmaker Mike Flanagan, appearing in his films Oculus (2013), Hush (2016; she also wrote the screenplay with him), Ouija: Origin of Evil (2016), and Gerald's Game (2017), as well as in his television series The Haunting of Hill House (2018), The Haunting of Bly Manor (2020) and Midnight Mass (2021). She has been dubbed a "scream queen" due to her consistent work on horror TV shows and movies.