Mary McCormack
Known for: Acting
Born: February 8, 1969
Place of birth: 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).
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Filmography
42 movies · 35 TV shows, newest first
6.0
Vicious
2025
8.7
The Pitt
2025
2.0
National Memorial Day Concert
2023
7.4
Heels
2021
6.8
Unpregnant
2020
7.6
The L Word: Generation Q
2019
5.3
Still Laugh-In: The Stars Celebrate
2019
5.5
Treehouse
2019
6.8
The Kids Are Alright
2018
5.2
25 Words or Less
2018
7.2
For the People
2018
7.5
Will & Grace
2017
5.3
Drone
2017
6.4
Loaded
2017
5.4
Alien Code
2017
4.5
The Crash
2017
7.8
An American Girl Story: Maryellen 1955 - Extraordinary Christmas
2016
6.5
Divorce
2016
6.4
Match Game
2016
5.8
To Tell the Truth
2016
5.1
Chelsea
2016
5.3
A Country Called Home
2016
5.4
Chelsea Does
2016
6.4
Angie Tribeca
2016
7.3
Scooby-Doo! WrestleMania Mystery
2014
5.3
Welcome to the Family
2013
6.7
Escape from Polygamy
2013
8.1
The Newsroom
2012
3.8
Should've Been Romeo
2012
7.2
Scandal
2012
6.6
House of Lies
20122.0
The Unprofessional
2012
4.9
Watch What Happens Live with Andy Cohen
2009
5.9
Late Night with Jimmy Fallon
2009
7.0
In Plain Sight
2008
6.7
1408
2007
5.8
For Your Consideration
2006
5.9
Right at Your Door
2006
5.8
Madison
2005
6.8
The Late Late Show with Craig Ferguson
2005
6.5
Traffic
2004
4.9
K Street
2003
5.6
The Ellen DeGeneres Show
2003
5.1
Dickie Roberts: Former Child Star
2003
5.3
Jimmy Kimmel Live!
2003
4.6
Full Frontal
2002
4.1
World Traveler
2002
7.2
K-PAX
2001
7.6
Law & Order: Criminal Intent
2001
6.1
High Heels and Low Lifes
2001
7.5
BigLove
200110.0
East of A
2000
5.2
Gun Shy
2000
6.3
The Broken Hearts Club: A Romantic Comedy
2000
4.0
Other Voices
2000
5.9
The Big Tease
1999
6.3
Mystery, Alaska
1999
8.3
The West Wing
1999
5.3
The Late Late Show with Craig Kilborn
1999
6.5
True Crime
1999
4.3
Harvest
1999
7.6
Getting to Know You
1999
4.5
The Alarmist
1998
5.9
54
1998
6.2
Deep Impact
1998
7.0
Murder One: Diary of a Serial Killer
1997
5.5
Fathers' Day
1997
6.5
Private Parts
1997
6.3
Colin Fitz
1997
7.7
Murder One
1995
10.0
The Wright Verdicts
1995
3.4
Backfire!
1995
6.8
Miracle on 34th Street
1994
7.8
ER
1994
5.4
The Tonight Show with Jay Leno
1992
7.3
Law & Order
1990
NR
Tony Awards
1956