Mary Catherine McCormack (born February 8, 1969) is an American actress. She has had leading roles as Justine Appleton in the series Murder One (1995–97), as Deputy National Security Adviser Kate Harper in The West Wing (2004–06), as Deputy U.S. Marshal Mary Shannon in In Plain Sight (2008–12), and as Peggy in the comedy series The Kids Are Alright (2018–19).
Her film roles include Private Parts (1997), Deep Impact (1998), True Crime (1999), Mystery, Alaska (1999), K-PAX (2001), Dickie Roberts: Former Child Star (2003) and 1408 (2007).
Early life
McCormack was born in Plainfield, New Jersey. She is the daughter of clinical therapist Norah and car dealership and ice cream parlor owner William McCormack. Her parents divorced in 1990. Her sister Bridget was the Chief Justice of the Michigan Supreme Court and a former professor of law at the University of Michigan Law School. Her brother William is an actor, writer and producer who has appeared in a recurring role as FBI agent Robert O'Connor on In Plain Sight.
In 1987, McCormack graduated from the Wardlaw-Hartridge School in Edison, New Jersey. In 1991, she received her BA in comparative arts, specifically painting and creative writing,...More about Mary McCormack...
