
Mary McCormack
Acting
Born: 1969-02-08 ยท Plainfield, New Jersey, USA
Biography
Mary Catherine McCormack is an American actress. She has had leading roles as Justine Appleton on the series Murder One (1995โ1997), as Deputy National Security Adviser Kate Harper on The West Wing (2004โ2006), as Deputy U.S. Marshal Mary Shannon on In Plain Sight (2008โ2012), and as Peggy on the comedy series The Kids Are Alright (2018โ2019).
๐ฌ Movies (20)

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
๐บ TV Shows (20)

The Pitt
2025
Dr. Linda Conley

Heels
2021
Willie Day

The L Word: Generation Q
2019
Anne Finley

The Kids Are Alright
2018
Peggy Cleary

25 Words or Less
2018
Self

25 Words or Less
2018

25 Words or Less
2018
Mary McCormack

For the People
2018
Chloe Daniels

Will & Grace
2017
Janet

Loaded
2017
Casey

Divorce
2016
Kathy DeSantis

Match Game
2016
Self - Panelist

To Tell the Truth
2016
Self - Panelist

Chelsea
2016
Self

Chelsea Does
2016
Herself

Angie Tribeca
2016
Abigail Liukin

Welcome to the Family
2013
Caroline Yoder

The Newsroom
2012
Molly Levy

Scandal
2012
Lisa Elliot

House of Lies
2012
Denna Altshuler