Acting
Mary McCormack
Born 1969-02-08
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).
Acting
Vicious
2025 · Mother
National Memorial Day Concert
2023 · Self
Unpregnant
2020 · Debra Clarke
Still Laugh-In: The Stars Celebrate
2019 · Self
Treehouse
2019 · Lilith
Drone
2017 · Ellen
Alien Code
2017 · Rebecca
The Crash
2017 · Sarah Schwab
An American Girl Story: Maryellen 1955 - Extraordinary Christmas
2016 · Kay Larkin
A Country Called Home
2016 · Amanda
Scooby-Doo! WrestleMania Mystery
2014 · Ms. Richards (voice)
Escape from Polygamy
2013 · Leann
Should've Been Romeo
2012 · Ellen
The Unprofessional
2012 · Hilary Pfeiffer-Dunne
1408
2007 · Lilly Enslin
For Your Consideration
2006 · Pilgrim Woman
Right at Your Door
2006 · Lexi
Madison
2005 · Bonnie McCormick
Dickie Roberts: Former Child Star
2003 · Grace Finney
Full Frontal
2002 · Linda
World Traveler
2002 · Margaret
K-PAX
2001 · Rachel Powell
High Heels and Low Lifes
2001 · Frances
BigLove
2001 · Phoebe
East of A
2000 · Daphne
Gun Shy
2000 · Gloria Nesstra
The Broken Hearts Club: A Romantic Comedy
2000 · Anne
Other Voices
2000 · Anna
The Big Tease
1999 · Monique
Mystery, Alaska
1999 · Donna Biebe
True Crime
1999 · Michelle Ziegler
Harvest
1999 · Agent Becka Anslinger