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).
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).
External links
IMDb: https://www.imdb.com/title/nm0005203
Wikipedia: https://www.wikidata.org/wiki/Q242650
Facebook: No data
Instagram: https://instagram.com/marycmccormack
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Filmography (Movies)
Vicious
Character:Mother
Release Date:19/09/2025
National Memorial Day Concert
Character:Self
Release Date:28/05/2023
Unpregnant
Character:Debra Clarke
Release Date:10/09/2020
Still Laugh-In: The Stars Celebrate
Character:Self
Release Date:14/05/2019
Treehouse
Character:Lilith
Release Date:01/03/2019
Drone
Character:Ellen
Release Date:26/05/2017
Alien Code
Character:Rebecca
Release Date:23/04/2017
The Crash
Character:Sarah Schwab
Release Date:13/01/2017
An American Girl Story: Maryellen 1955 - Extraordinary Christmas
Character:Kay Larkin
Release Date:25/11/2016
A Country Called Home
Character:Amanda
Release Date:26/02/2016
Scooby-Doo! WrestleMania Mystery
Character:Ms. Richards (voice)
Release Date:11/03/2014
Escape from Polygamy
Character:Leann
Release Date:24/08/2013
Should've Been Romeo
Character:Ellen
Release Date:28/04/2012
The Unprofessional
Character:Hilary Pfeiffer-Dunne
Release Date:01/01/2012
1408
Character:Lilly Enslin
Release Date:22/06/2007
For Your Consideration
Character:Pilgrim Woman
Release Date:17/11/2006
Right at Your Door
Character:Lexi
Release Date:23/01/2006
Madison
Character:Bonnie McCormick
Release Date:22/04/2005
Dickie Roberts: Former Child Star
Character:Grace Finney
Release Date:04/09/2003
Full Frontal
Character:Linda
Release Date:02/08/2002
World Traveler
Character:Margaret
Release Date:19/04/2002
K-PAX
Character:Rachel Powell
Release Date:26/10/2001
High Heels and Low Lifes
Character:Frances
Release Date:16/07/2001
BigLove
Character:Phoebe
Release Date:19/01/2001
East of A
Character:Daphne
Release Date:03/03/2000
Gun Shy
Character:Gloria Nesstra
Release Date:04/02/2000
The Broken Hearts Club: A Romantic Comedy
Character:Anne
Release Date:01/02/2000
Other Voices
Character:Anna
Release Date:22/01/2000
The Big Tease
Character:Monique
Release Date:26/11/1999
Mystery, Alaska
Character:Donna Biebe
Release Date:01/10/1999
True Crime
Character:Michelle Ziegler
Release Date:19/03/1999
Harvest
Character:Agent Becka Anslinger
Release Date:12/03/1999
Getting to Know You
Character:Leila Lee
Release Date:22/01/1999
The Alarmist
Character:Sally
Release Date:23/10/1998
54
Character:New Year's Eve Wife (uncredited)
Release Date:28/08/1998
Deep Impact
Character:Andrea Baker
Release Date:08/05/1998
Murder One: Diary of a Serial Killer
Character:Justine Appleton
Release Date:25/05/1997
Fathers' Day
Character:Virginia Farrell (uncredited)
Release Date:09/05/1997
Private Parts
Character:Alison Stern
Release Date:07/03/1997
Colin Fitz
Character:Moira
Release Date:19/01/1997
Backfire!
Character:Sarah Jackson
Release Date:20/01/1995
Miracle on 34th Street
Character:Myrna Foy
Release Date:18/11/1994
Television Appearances
Heels
Character:Willie Day
The L Word: Generation Q
Character:Anne Finley
The Kids Are Alright
Character:Peggy Cleary
25 Words or Less
Character:Self
25 Words or Less
Character:
25 Words or Less
Character:Mary McCormack
For the People
Character:Chloe Daniels
Will & Grace
Character:Janet
Loaded
Character:Casey
Divorce
Character:Kathy DeSantis
Match Game
Character:Self - Panelist
To Tell the Truth
Character:Self - Panelist
Chelsea
Character:Self
Chelsea Does
Character:Herself
Angie Tribeca
Character:Abigail Liukin
Welcome to the Family
Character:Caroline Yoder
The Newsroom
Character:Molly Levy
Scandal
Character:Lisa Elliot
House of Lies
Character:Denna Altshuler
Watch What Happens Live with Andy Cohen
Character:Self - Guest
Late Night with Jimmy Fallon
Character:Self
In Plain Sight
Character:Mary Shannon
The Late Late Show with Craig Ferguson
Character:Self
Traffic
Character:Carole McKay
K Street
Character:Maggie Morris
The Ellen DeGeneres Show
Character:Self
Law & Order: Criminal Intent
Character:Mary Shannon
The West Wing
Character:Kate Harper
The Late Late Show with Craig Kilborn
Character:Self - Guest
Murder One
Character:Justine Appleton
The Wright Verdicts
Character:Beth Eckhart
ER
Character:Debbie
The Tonight Show with Jay Leno
Character:
Law & Order
Character:Rickie the Bartender
Tony Awards
Character:Self - Nominee
Images
