Mary McCormack, American actress and producer
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).