Mary McCormack
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 (78 titles)
6.0MovieVicious
Mother · 2025
8.7ShowThe Pitt
Dr. Linda Conley · 2025
2.0MovieNational Memorial Day Concert
Self · 2023
7.4ShowHeels
Willie Day · 2021
6.8MovieUnpregnant
Debra Clarke · 2020
7.6ShowThe L Word: Generation Q
Anne Finley · 2019
5.4MovieStill Laugh-In: The Stars Celebrate
Self · 2019
5.5MovieTreehouse
Lilith · 2019
6.8ShowThe Kids Are Alright
Peggy Cleary · 2018
5.2Show25 Words or Less
Self · 2018
7.2ShowFor the People
Chloe Daniels · 2018
7.5ShowWill & Grace
Janet · 2017
5.3MovieDrone
Ellen · 2017
6.4ShowLoaded
Casey · 2017
5.3MovieAlien Code
Rebecca · 2017
4.1ShowNobodies
Bitsy Hewitt-Bowles · 2017
4.5MovieThe Crash
Sarah Schwab · 2017
7.4MovieAn American Girl Story: Maryellen 1955 - Extraordinary Christmas
Kay Larkin · 2016
6.5ShowDivorce
Kathy DeSantis · 2016
6.5ShowMatch Game
Self - Panelist · 2016
5.8ShowTo Tell the Truth
Self - Panelist · 2016
5.1ShowChelsea
Self · 2016
5.3MovieA Country Called Home
Amanda · 2016
5.4ShowChelsea Does
Herself · 2016