Actor
Mary McCormack
57 years · Plainfield, New Jersey, USA · 40 films
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).
Best known for
Filmography 40
Vicious
2025 · Mother
On fuboTV
National Memorial Day Concert
2023 · Self
Unpregnant
2020 · Debra Clarke
On HBO Max
Still Laugh-In: The Stars Celebrate
2019 · Self
On Netflix
Treehouse
2019 · Lilith
On Hulu
Drone
2017 · Ellen
On Plex
Alien Code
2017 · Rebecca
On The CW
The Crash
2017 · Sarah Schwab
On Plex
An American Girl Story: Maryellen 1955 - Extraordinary Christmas
2016 · Kay Larkin
A Country Called Home
2016 · Amanda
On Runtime
Scooby-Doo! WrestleMania Mystery
2014 · Ms. Richards (voice)
Escape from Polygamy
2013 · Leann
On Hoopla
Should've Been Romeo
2012 · Ellen
1408
2007 · Lilly Enslin
For Your Consideration
2006 · Pilgrim Woman
Right at Your Door
2006 · Lexi
On Plex
Madison
2005 · Bonnie McCormick
On Hoopla
Dickie Roberts: Former Child Star
2003 · Grace Finney
On fuboTV
Full Frontal
2002 · Linda
World Traveler
2002 · Margaret
K-PAX
2001 · Rachel Powell
On YouTube Free
High Heels and Low Lifes
2001 · Frances
On Hoopla
BigLove
2001 · Phoebe
Gun Shy
2000 · Gloria Nesstra
On Amazon Prime Video