- Known For
- Acting
- Born
- February 8, 1969
- Place of Birth
- Plainfield, New Jersey, USA
Mary McCormack
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).
Filmography
movieVicious
2025 · Mother
tvThe Pitt
2025 · Dr. Linda Conley
movieNational Memorial Day Concert
2023 · Self
tvHeels
2021 · Willie Day
movieUnpregnant
2020 · Debra Clarke
tvThe L Word: Generation Q
2019 · Anne Finley
movieStill Laugh-In: The Stars Celebrate
2019 · Self
movieTreehouse
2019 · Lilith
tvThe Kids Are Alright
2018 · Peggy Cleary
tv25 Words or Less
2018 · Self, Mary McCormack
tvFor the People
2018 · Chloe Daniels
tvWill & Grace
2017 · Janet
movieDrone
2017 · Ellen
tvLoaded
2017 · Casey
movieAlien Code
2017 · Rebecca
movieThe Crash
2017 · Sarah Schwab
movieAn American Girl Story: Maryellen 1955 - Extraordinary Christmas
2016 · Kay Larkin
tvDivorce
2016 · Kathy DeSantis
tvMatch Game
2016 · Self - Panelist
tvTo Tell the Truth
2016 · Self - Panelist
tvChelsea
2016 · Self
movieA Country Called Home
2016 · Amanda
tvChelsea Does
2016 · Herself
tvAngie Tribeca
2016 · Abigail Liukin
movieScooby-Doo! WrestleMania Mystery
2014 · Ms. Richards (voice)
tvWelcome to the Family
2013 · Caroline Yoder
movieEscape from Polygamy
2013 · Leann
tvThe Newsroom
2012 · Molly Levy
movieShould've Been Romeo
2012 · Ellen
tvScandal
2012 · Lisa Elliot
tvHouse of Lies
2012 · Denna Altshuler
The Unprofessional
2012 · Hilary Pfeiffer-Dunne
tvWatch What Happens Live with Andy Cohen
2009 · Self - Guest
tvLate Night with Jimmy Fallon
2009 · Self
tvIn Plain Sight
2008 · Mary Shannon
movie1408
2007 · Lilly Enslin
movieFor Your Consideration
2006 · Pilgrim Woman
movieRight at Your Door
2006 · Lexi
movieMadison
2005 · Bonnie McCormick
tvThe Late Late Show with Craig Ferguson
2005 · Self
tvTraffic
2004 · Carole McKay
tvK Street
2003 · Maggie Morris
tvThe Ellen DeGeneres Show
2003 · Self
movieDickie Roberts: Former Child Star
2003 · Grace Finney
tvJimmy Kimmel Live!
2003 · Self
movieFull Frontal
2002 · Linda
movieWorld Traveler
2002 · Margaret
movieK-PAX
2001 · Rachel Powell
tvLaw & Order: Criminal Intent
2001 · Mary Shannon
movieHigh Heels and Low Lifes
2001 · Frances
movieBigLove
2001 · Phoebe
East of A
2000 · Daphne
movieGun Shy
2000 · Gloria Nesstra
movieThe Broken Hearts Club: A Romantic Comedy
2000 · Anne
movieOther Voices
2000 · Anna
movieThe Big Tease
1999 · Monique
movieMystery, Alaska
1999 · Donna Biebe
tvThe West Wing
1999 · Kate Harper
tvThe Late Late Show with Craig Kilborn
1999 · Self - Guest
movieTrue Crime
1999 · Michelle Ziegler
movieHarvest
1999 · Agent Becka Anslinger
movieGetting to Know You
1999 · Leila Lee
movieThe Alarmist
1998 · Sally
movie54
1998 · New Year's Eve Wife (uncredited)
movieDeep Impact
1998 · Andrea Baker
movieMurder One: Diary of a Serial Killer
1997 · Justine Appleton
movieFathers' Day
1997 · Virginia Farrell (uncredited)
moviePrivate Parts
1997 · Alison Stern
movieColin Fitz
1997 · Moira
tvMurder One
1995 · Justine Appleton
tvThe Wright Verdicts
1995 · Beth Eckhart
movieBackfire!
1995 · Sarah
movieMiracle on 34th Street
1994 · Myrna Foy
tvER
1994 · Debbie
tvThe Tonight Show with Jay Leno
1992
tvLaw & Order
1990 · Rickie the Bartender
tvTony Awards
1956 · Self - Nominee