Deanna Dunagan (born May 25, 1940) is a Chicago-based American actress. Although Dunagan has appeared on television and in films, she is most admired for her work as a stage actress. She is best known for her Tony Award-winning portrayal of Violet Weston in Tracy Letts' August: Osage County and for her portrayal of Nana in M. Night Shyamalan's 2015 film The Visit. She has also appeared in the recurring role of Mother Bernadette on the Fox television series The Exorcist, and Dr. Willa Sipe in the 2018 film An Acceptable Loss by writer Joe Chappelle.
