The West Wing (8.3)
Show · 1999
as Kate Harper
Mary McCormack
Born on February 8, 1969 in Plainfield, New Jersey, USA.
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).
ER (7.8)
Show · 1994
as Debbie
Murder One (7.7)
Show · 1995
as Justine Appleton
Getting to Know You (7.5)
Movie · 1999
as Leila Lee
Heels (7.4)
Show · 2021
as Willie Day
An American Girl Story: Maryellen 1955 - Extraordinary Christmas (7.4)
Movie · 2016
as Kay Larkin
Scooby-Doo! WrestleMania Mystery (7.3)
Movie · 2014
as Ms. Richards (voice)
K-PAX (7.2)
Movie · 2001
as Rachel Powell
In Plain Sight (7.0)
Show · 2008
as Mary Shannon
Miracle on 34th Street (6.8)
Movie · 1994
as Myrna Foy
Unpregnant (6.8)
Movie · 2020
as Debra Clarke
The Kids Are Alright (6.8)
Show · 2018
as Peggy Cleary
1408 (6.7)
Movie · 2007
as Lilly Enslin
Escape from Polygamy (6.7)
Movie · 2013
as Leann
House of Lies (6.6)
Show · 2012
as Denna Altshuler
True Crime (6.5)
Movie · 1999
as Michelle Ziegler
Private Parts (6.5)
Movie · 1997
as Alison Stern
Traffic (6.5)
Show · 2004
as Carole McKay
Angie Tribeca (6.4)
Show · 2016
as Abigail Liukin
Loaded (6.4)
Show · 2017
as Casey
Deep Impact (6.3)
Movie · 1998
as Andrea Baker
Mystery, Alaska (6.3)
Movie · 1999
as Donna Biebe
The Broken Hearts Club: A Romantic Comedy (6.3)
Movie · 2000
as Anne
High Heels and Low Lifes (6.1)
Movie · 2001
as Frances
Vicious (6.0)
Movie · 2025
as Mother
54 (5.9)
Movie · 1998
as New Year's Eve Wife (uncredited)
The Big Tease (5.9)
Movie · 1999
as Monique
Right at Your Door (5.8)
Movie · 2006
as Lexi
For Your Consideration (5.8)
Movie · 2006
as Pilgrim Woman
Madison (5.8)
Movie · 2005
as Bonnie McCormick
Fathers' Day (5.5)
Movie · 1997
as Virginia Farrell (uncredited)
Treehouse (5.5)
Movie · 2019
as Lilith
Welcome to the Family (5.4)
Show · 2013
as Caroline Yoder
Drone (5.3)
Movie · 2017
as Ellen
Alien Code (5.3)
Movie · 2017
as Rebecca
A Country Called Home (5.3)
Movie · 2016
as Amanda
Gun Shy (5.2)
Movie · 2000
as Gloria Nesstra
Dickie Roberts: Former Child Star (5.1)
Movie · 2003
as Grace Finney
K Street (4.9)
Show · 2003
as Maggie Morris
Full Frontal (4.6)
Movie · 2002
as Linda
The Crash (4.5)
Movie · 2017
as Sarah Schwab
The Alarmist (4.5)
Movie · 1998
as Sally
World Traveler (4.2)
Movie · 2002
as Margaret
Other Voices (4.0)
Movie · 2000
as Anna
Backfire! (3.4)
Movie · 1995
as Sarah