Mary McCormack
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Mary Catherine McCormack is an American actress. She has had leading roles as Justine Appleton on the series Murder One (1995–1997), as Deputy National Security Adviser Kate Harper on The West Wing (2004–2006), as Deputy U.S. Marshal Mary Shannon on In Plain Sight (2008–2012), and as Peggy on the comedy series The Kids Are Alright (2018–2019).
Known for
Credits
Deep Impact (1998)
as Andrea Baker
1408 (2007)
as Lilly Enslin
Miracle on 34th Street (1994)
as Myrna Foy
K-PAX (2001)
as Rachel Powell
Vicious (2025)
as Mother
True Crime (1999)
as Michelle Ziegler
54 (1998)
as New Year's Eve Wife (uncredited)
Gun Shy (2000)
as Gloria Nesstra
Private Parts (1997)
as Alison Stern
Fathers' Day (1997)
as Virginia Farrell (uncredited)
Drone (2017)
as Ellen
Full Frontal (2002)
as Linda
For Your Consideration (2006)
as Pilgrim Woman
Mystery, Alaska (1999)
as Donna Biebe
Scooby-Doo! WrestleMania Mystery (2014)
as Ms. Richards (voice)
High Heels and Low Lifes (2001)
as Frances
Alien Code (2017)
as Rebecca
Dickie Roberts: Former Child Star (2003)
as Grace Finney
Treehouse (2019)
as Lilith
Unpregnant (2020)
as Debra Clarke
The Crash (2017)
as Sarah Schwab
The Broken Hearts Club: A Romantic Comedy (2000)
as Anne
Right at Your Door (2006)
as Lexi
BigLove (2001)
as Phoebe
The Big Tease (1999)
as Monique
Backfire! (1995)
as Sarah
The Alarmist (1998)
as Sally
Colin Fitz (1997)
as Moira
Other Voices (2000)
as Anna
Still Laugh-In: The Stars Celebrate (2019)
as Self
A Country Called Home (2016)
as Amanda
Should've Been Romeo (2012)
as Ellen
Getting to Know You (1999)
as Leila Lee
Madison (2005)
as Bonnie McCormick
The Unprofessional (2012)
as Hilary Pfeiffer-Dunne
Harvest (1999)
as Agent Becka Anslinger
Escape from Polygamy (2013)
as Leann
World Traveler (2002)
as Margaret
An American Girl Story: Maryellen 1955 - Extraordinary Christmas (2016)
as Kay Larkin
Murder One: Diary of a Serial Killer (1997)
as Justine Appleton
East of A (2000)
as Daphne
National Memorial Day Concert (2023)
as Self