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).
Known for
Law & Order
Rickie the Bartender
Will & Grace
Janet
ER
Debbie
The West Wing
Kate Harper
Law & Order: Criminal Intent
Mary Shannon
Scandal
Lisa Elliot
25 Words or Less
Self
25 Words or Less
25 Words or Less
Mary McCormack
The Newsroom
Molly Levy
In Plain Sight
Mary Shannon
Angie Tribeca
Abigail Liukin
Match Game
Self - Panelist
To Tell the Truth
Self - Panelist
House of Lies
Denna Altshuler
Should've Been Romeo
Ellen
Murder One
Justine Appleton
Deep Impact
Andrea Baker
For the People
Chloe Daniels
Divorce
Kathy DeSantis
The L Word: Generation Q
Anne Finley
K Street
Maggie Morris
K-PAX
Rachel Powell
Murder One: Diary of a Serial Killer
Justine Appleton
Vicious
Mother
54
New Year's Eve Wife (uncredited)
Traffic
Carole McKay
Heels
Willie Day
1408
Lilly Enslin
Alien Code
Rebecca
Miracle on 34th Street
Myrna Foy
The Kids Are Alright
Peggy Cleary
Scooby-Doo! WrestleMania Mystery
Ms. Richards (voice)
True Crime
Michelle Ziegler
A Country Called Home
Amanda
Colin Fitz
Moira
Loaded
Casey
World Traveler
Margaret
Still Laugh-In: The Stars Celebrate
Self
The Crash
Sarah Schwab
Gun Shy
Gloria Nesstra
Private Parts
Alison Stern
Fathers' Day
Virginia Farrell (uncredited)
Escape from Polygamy
Leann
Dickie Roberts: Former Child Star
Grace Finney
High Heels and Low Lifes
Frances
Drone
Ellen
The Wright Verdicts
Beth Eckhart
Full Frontal
Linda
Welcome to the Family
Caroline Yoder
Unpregnant
Debra Clarke
Mystery, Alaska
Donna Biebe
For Your Consideration
Pilgrim Woman
The Broken Hearts Club: A Romantic Comedy
Anne
East of A
Daphne
Treehouse
Lilith
Madison
Bonnie McCormick
The Alarmist
Sally
An American Girl Story: Maryellen 1955 - Extraordinary Christmas
Kay Larkin
Right at Your Door
Lexi
Harvest
Agent Becka Anslinger
The Big Tease
Monique
Other Voices
Anna
Chelsea Does
Herself
BigLove
Phoebe
The Unprofessional
Hilary Pfeiffer-Dunne
Backfire!
Sarah
Getting to Know You
Leila Lee
National Memorial Day Concert
Self
Watch What Happens Live with Andy Cohen
Self - Guest
The Late Late Show with Craig Ferguson
Self
The Tonight Show with Jay Leno
The Ellen DeGeneres Show
Self
Chelsea
Self
Late Night with Jimmy Fallon
Self
The Late Late Show with Craig Kilborn
Self - Guest