Mary McCormack
Acting
1969-02-08 · 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).
Filmography
Vicious
2025 · Movie
The Pitt
2025 · Series
National Memorial Day Concert
2023 · Movie
Heels
2021 · Series
Unpregnant
2020 · Movie
The L Word: Generation Q
2019 · Series
Still Laugh-In: The Stars Celebrate
2019 · Movie
Treehouse
2019 · Movie
The Kids Are Alright
2018 · Series
25 Words or Less
2018 · Series
For the People
2018 · Series
Will & Grace
2017 · Series
Drone
2017 · Movie
Loaded
2017 · Series
Alien Code
2017 · Movie
The Crash
2017 · Movie
An American Girl Story: Maryellen 1955 - Extraordinary Christmas
2016 · Movie
Divorce
2016 · Series
Match Game
2016 · Series
To Tell the Truth
2016 · Series
Chelsea
2016 · Series
A Country Called Home
2016 · Movie
Chelsea Does
2016 · Series
Angie Tribeca
2016 · Series
Scooby-Doo! WrestleMania Mystery
2014 · Movie
Welcome to the Family
2013 · Series
Escape from Polygamy
2013 · Movie
The Newsroom
2012 · Series
Should've Been Romeo
2012 · Movie
Scandal
2012 · Series
House of Lies
2012 · Series
The Unprofessional
2012 · Movie
Watch What Happens Live with Andy Cohen
2009 · Series
Late Night with Jimmy Fallon
2009 · Series
In Plain Sight
2008 · Series
1408
2007 · Movie
For Your Consideration
2006 · Movie
Right at Your Door
2006 · Movie
Madison
2005 · Movie
The Late Late Show with Craig Ferguson
2005 · Series
Traffic
2004 · Series
K Street
2003 · Series
The Ellen DeGeneres Show
2003 · Series
Dickie Roberts: Former Child Star
2003 · Movie
Jimmy Kimmel Live!
2003 · Series
Full Frontal
2002 · Movie
World Traveler
2002 · Movie
K-PAX
2001 · Movie
Law & Order: Criminal Intent
2001 · Series
High Heels and Low Lifes
2001 · Movie
BigLove
2001 · Movie
East of A
2000 · Movie
Gun Shy
2000 · Movie
The Broken Hearts Club: A Romantic Comedy
2000 · Movie
Other Voices
2000 · Movie
The Big Tease
1999 · Movie
Mystery, Alaska
1999 · Movie
The West Wing
1999 · Series
The Late Late Show with Craig Kilborn
1999 · Series
True Crime
1999 · Movie
Harvest
1999 · Movie
Getting to Know You
1999 · Movie
The Alarmist
1998 · Movie
54
1998 · Movie
Deep Impact
1998 · Movie
Murder One: Diary of a Serial Killer
1997 · Movie
Fathers' Day
1997 · Movie
Private Parts
1997 · Movie
Colin Fitz
1997 · Movie
Murder One
1995 · Series
The Wright Verdicts
1995 · Series
Backfire!
1995 · Movie
Miracle on 34th Street
1994 · Movie
ER
1994 · Series
The Tonight Show with Jay Leno
1992 · Series
Law & Order
1990 · Series
Tony Awards
1956 · Series