Mary McCormack
Acting
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).
Known for
2025Vicious
Mother
2023National Memorial Day Concert
Self
2020Unpregnant
Debra Clarke
2019Treehouse
Lilith
2019Still Laugh-In: The Stars Celebrate
Self
2017The Crash
Sarah Schwab
2017Drone
Ellen
2017Alien Code
Rebecca
2016A Country Called Home
Amanda
2016An American Girl Story: Maryellen 1955 - Extraordinary Christmas
Kay Larkin
2014Scooby-Doo! WrestleMania Mystery
Ms. Richards (voice)
2013Escape from Polygamy
Leann
2012Should've Been Romeo
Ellen
20071408
Lilly Enslin
2006Right at Your Door
Lexi
2006For Your Consideration
Pilgrim Woman
2005Madison
Bonnie McCormick
2003Dickie Roberts: Former Child Star
Grace Finney
2002Full Frontal
Linda
2002World Traveler
Margaret
2001K-PAX
Rachel Powell
2001High Heels and Low Lifes
Frances
2001BigLove
Phoebe
2000The Broken Hearts Club: A Romantic Comedy
Anne