Acting
Mary McCormack
Born February 8, 1969 · 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 (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
6.7 TMDB
1408
Lilly Enslin
6.3 TMDB
Deep Impact
Andrea Baker
7.2 TMDB
K-PAX
Rachel Powell
6.8 TMDB
Miracle on 34th Street
Myrna Foy
8.7 TMDB
The Pitt
Dr. Linda Conley
7.8 TMDB
ER
Debbie
6.5 TMDB
True Crime
Michelle Ziegler
8.1 TMDB
The Newsroom
Molly Levy
7.3 TMDB
Law & Order
Rickie the Bartender
7.2 TMDB
Scandal
Lisa Elliot
8.3 TMDB
The West Wing
Kate Harper
5.9 TMDB
54
New Year's Eve Wife (uncredited)
6.5 TMDB
Private Parts
Alison Stern
7.6 TMDB
Law & Order: Criminal Intent
Mary Shannon
7.3 TMDB
Scooby-Doo! WrestleMania Mystery
Ms. Richards (voice)
6.8 TMDB
Unpregnant
Debra Clarke
5.5 TMDB
Fathers' Day
Virginia Farrell (uncredited)
6.0 TMDB
Vicious
Mother
6.3 TMDB
Mystery, Alaska
Donna Biebe
5.3 TMDB
Drone
Ellen
Filmography
- 2025ViciousMotherMovie
- 2025The PittDr. Linda ConleySeries
- 2023National Memorial Day ConcertSelfMovie
- 2021HeelsWillie DaySeries
- 2020UnpregnantDebra ClarkeMovie
- 2019The L Word: Generation QAnne FinleySeries
- 2019Still Laugh-In: The Stars CelebrateSelfMovie
- 2019TreehouseLilithMovie
- 2018The Kids Are AlrightPeggy ClearySeries
- 201825 Words or LessSelf, Mary McCormackSeries
- 2018For the PeopleChloe DanielsSeries
- 2017Will & GraceJanetSeries
- 2017DroneEllenMovie
- 2017LoadedCaseySeries
- 2017Alien CodeRebeccaMovie
- 2017NobodiesBitsy Hewitt-BowlesSeries
- 2017The CrashSarah SchwabMovie
- 2016An American Girl Story: Maryellen 1955 - Extraordinary ChristmasKay LarkinMovie
- 2016DivorceKathy DeSantisSeries
- 2016Match GameSelf - PanelistSeries
- 2016To Tell the TruthSelf - PanelistSeries
- 2016ChelseaSelfSeries
- 2016A Country Called HomeAmandaMovie
- 2016Chelsea DoesHerselfSeries
- 2016Angie TribecaAbigail LiukinSeries
- 2014Scooby-Doo! WrestleMania MysteryMs. Richards (voice)Movie
- 2013Welcome to the FamilyCaroline YoderSeries
- 2013Escape from PolygamyLeannMovie
- 2012The NewsroomMolly LevySeries
- 2012Should've Been RomeoEllenMovie
- 2012ScandalLisa ElliotSeries
- 2012House of LiesDenna AltshulerSeries
- 2012The UnprofessionalHilary Pfeiffer-DunneMovie
- 2009Watch What Happens Live with Andy CohenSelf - GuestSeries
- 2009Late Night with Jimmy FallonSelfSeries
- 2008In Plain SightMary ShannonSeries
- 20071408Lilly EnslinMovie
- 2006For Your ConsiderationPilgrim WomanMovie
- 2006Right at Your DoorLexiMovie
- 2005MadisonBonnie McCormickMovie
- 2005The Late Late Show with Craig FergusonSelfSeries
- 2004TrafficCarole McKaySeries
- 2003K StreetMaggie MorrisSeries
- 2003The Ellen DeGeneres ShowSelfSeries
- 2003Dickie Roberts: Former Child StarGrace FinneyMovie
- 2003Jimmy Kimmel Live!SelfSeries
- 2002Full FrontalLindaMovie
- 2002World TravelerMargaretMovie
- 2001K-PAXRachel PowellMovie
- 2001Law & Order: Criminal IntentMary ShannonSeries
- 2001High Heels and Low LifesFrancesMovie
- 2001BigLovePhoebeMovie
- 2000East of ADaphneMovie
- 2000Gun ShyGloria NesstraMovie
- 2000The Broken Hearts Club: A Romantic ComedyAnneMovie
- 2000Other VoicesAnnaMovie
- 1999The Big TeaseMoniqueMovie
- 1999Mystery, AlaskaDonna BiebeMovie
- 1999The West WingKate HarperSeries
- 1999The Late Late Show with Craig KilbornSelf - GuestSeries
- 1999True CrimeMichelle ZieglerMovie
- 1999HarvestAgent Becka AnslingerMovie
- 1999Getting to Know YouLeila LeeMovie
- 1998The AlarmistSallyMovie
- 199854New Year's Eve Wife (uncredited)Movie
- 1998Deep ImpactAndrea BakerMovie
- 1997Murder One: Diary of a Serial KillerJustine AppletonMovie
- 1997Fathers' DayVirginia Farrell (uncredited)Movie
- 1997Private PartsAlison SternMovie
- 1997Colin FitzMoiraMovie
- 1995Murder OneJustine AppletonSeries
- 1995The Wright VerdictsBeth EckhartSeries
- 1995Backfire!SarahMovie
- 1994Miracle on 34th StreetMyrna FoyMovie
- 1994ERDebbieSeries
- 1992The Tonight Show with Jay LenoSeries
- 1990Law & OrderRickie the BartenderSeries
- 1956Tony AwardsSelf - NomineeSeries