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