Background
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.
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.
In 1983, McCormack graduated from the Wardlaw-Hartridge School in Edison, New Jersey. She continued her stage work in musicals and finished an acting program at the William Esper Studio.
She has had leading roles as Justine Appleton in the series Murder One (1995-1997), as Deputy National Security Adviser Kate Harper in The West Wing (2004-2006) and as Mary Shannon in In Plain Sight (2008-2012). Her film roles include Private Parts (1997). Deep Impact (1998); True Crime (1999).
High Heels and Low Lifes (2001).
K-PAX (2001); Right at Your Door (2006), and 1408 (2007). In 1991, she received her Bachelor in comparative arts, specifically painting and creative writing, from Trinity College in Hartford, Connecticut.
McCormack began her acting career at age 12, performing in Gian Carlo Menotti"s Christmas opera, Amahl and the Night Visitors. She has worked in New York theater productions, including The Atlantic Theater Company, Alice"s 4th Floor, and Naked Angels, where she appeared in Jon Robin Baitz"s A Fair Country.
McCormack portrayed Justine Appleton on Murder One (1995–1997) and also starred in the Home Box Office series K Street, which aired for only ten episodes.
She starred in Howard Stern"s movie Private Parts in 1997. In 2004, McCormack joined the cast of The West Wing as Deputy National Security Advisor and ex-Central Intelligence Agency officer Kate Harper. Her character soon became a recurring role and remained throughout the last three seasons until the series finale.
McCormack starred in United States of America Network series In Plain Sight.
She portrayed Mary Shannon, a deputy United States marshal attached to the Albuquerque, New Mexico office of the Federal Witness Security Program (WITSEC), more commonly known as the Federal Witness Protection Program. On July 28, 2010, the show was renewed for its fourth and fifth seasons, to run in 2011 and 2012.
The show was cancelled in 2011, making the fifth season its last. After its end, McCormack was cast as the lead in Kari Lizer"s untitled comedy pilot on American Broadcasting Company. McCormack was nominated for the 2008 Tony Award for Best Performance by a Featured Actress in a Play for the role of Gretchen in the 2008 Broadway revival of Boeing Boeing.
In 2012, McCormack reunited with the cast of West Wing to film a video that served both as a reminder that United States. voters should vote for non-partisan candidates when they cast their ballots and as a video promoting McCormack"s sister"s ultimately successful judicial candidacy for the Michigan State Supreme Court.
In October 2013, McCormack started filming scenes for A Conspiracy on Jekyll Island alongside Frank Grillo, AnnaSophia Robb, Minnie Driver, Dianna Agron, John Leguizamo, Editor Westwick, Christopher McDonald and Maggie Q. The film is directed by Aram Rappaport and produced by Hilary Shor, Atit Shah and Aaron Becker. Jekyll Island is set to release in 2016.