Known For
Acting
Known Credits
79
Gender
Female
Birthday
February 8, 1969 (57 years old)
Place of Birth
Plainfield, New Jersey, USA
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).
| 2025 | Viciousas Mother | |
| 2025 | The Pittas Dr. Linda Conley | |
| 2023 | National Memorial Day Concertas Self | |
| 2021 | Heelsas Willie Day | |
| 2020 | Unpregnantas Debra Clarke | |
| 2019 | The L Word: Generation Qas Anne Finley | |
| 2019 | Still Laugh-In: The Stars Celebrateas Self | |
| 2019 | Treehouseas Lilith | |
| 2018 | The Kids Are Alrightas Peggy Cleary | |
| 2018 | 25 Words or Lessas | |
| 2018 | 25 Words or Lessas Mary McCormack | |
| 2018 | 25 Words or Lessas Self | |
| 2018 | For the Peopleas Chloe Daniels | |
| 2017 | Will & Graceas Janet | |
| 2017 | Droneas Ellen | |
| 2017 | Loadedas Casey | |
| 2017 | Alien Codeas Rebecca | |
| 2017 | The Crashas Sarah Schwab | |
| 2016 | An American Girl Story: Maryellen 1955 - Extraordinary Christmasas Kay Larkin | |
| 2016 | Divorceas Kathy DeSantis | |
| 2016 | Match Gameas Self - Panelist | |
| 2016 | To Tell the Truthas Self - Panelist | |
| 2016 | Chelseaas Self | |
| 2016 | A Country Called Homeas Amanda | |
| 2016 | Chelsea Doesas Herself | |
| 2016 | Angie Tribecaas Abigail Liukin | |
| 2014 | Scooby-Doo! WrestleMania Mysteryas Ms. Richards (voice) | |
| 2013 | Welcome to the Familyas Caroline Yoder | |
| 2013 | Escape from Polygamyas Leann | |
| 2012 | The Newsroomas Molly Levy | |
| 2012 | Should've Been Romeoas Ellen | |
| 2012 | Scandalas Lisa Elliot | |
| 2012 | House of Liesas Denna Altshuler | |
| 2012 | The Unprofessionalas Hilary Pfeiffer-Dunne | |
| 2009 | Watch What Happens Live with Andy Cohenas Self - Guest | |
| 2009 | Late Night with Jimmy Fallonas Self | |
| 2008 | In Plain Sightas Mary Shannon | |
| 2007 | 1408as Lilly Enslin | |
| 2006 | For Your Considerationas Pilgrim Woman | |
| 2006 | Right at Your Dooras Lexi | |
| 2005 | Madisonas Bonnie McCormick | |
| 2005 | The Late Late Show with Craig Fergusonas Self | |
| 2004 | Trafficas Carole McKay | |
| 2003 | K Streetas Maggie Morris | |
| 2003 | The Ellen DeGeneres Showas Self | |
| 2003 | Dickie Roberts: Former Child Staras Grace Finney | |
| 2003 | Jimmy Kimmel Live!as Self | |
| 2002 | Full Frontalas Linda | |
| 2002 | World Traveleras Margaret | |
| 2001 | K-PAXas Rachel Powell | |
| 2001 | Law & Order: Criminal Intentas Mary Shannon | |
| 2001 | High Heels and Low Lifesas Frances | |
| 2001 | BigLoveas Phoebe | |
| 2000 | East of Aas Daphne | |
| 2000 | Gun Shyas Gloria Nesstra | |
| 2000 | The Broken Hearts Club: A Romantic Comedyas Anne | |
| 2000 | Other Voicesas Anna | |
| 1999 | The Big Teaseas Monique | |
| 1999 | Mystery, Alaskaas Donna Biebe | |
| 1999 | The West Wingas Kate Harper | |
| 1999 | The Late Late Show with Craig Kilbornas Self - Guest | |
| 1999 | True Crimeas Michelle Ziegler | |
| 1999 | Harvestas Agent Becka Anslinger | |
| 1999 | Getting to Know Youas Leila Lee | |
| 1998 | The Alarmistas Sally | |
| 1998 | 54as New Year's Eve Wife (uncredited) | |
| 1998 | Deep Impactas Andrea Baker | |
| 1997 | Murder One: Diary of a Serial Killeras Justine Appleton | |
| 1997 | Fathers' Dayas Virginia Farrell (uncredited) | |
| 1997 | Private Partsas Alison Stern | |
| 1997 | Colin Fitzas Moira | |
| 1995 | Murder Oneas Justine Appleton | |
| 1995 | The Wright Verdictsas Beth Eckhart | |
| 1995 | Backfire!as Sarah | |
| 1994 | Miracle on 34th Streetas Myrna Foy | |
| 1994 | ERas Debbie | |
| 1992 | The Tonight Show with Jay Lenoas | |
| 1990 | Law & Orderas Rickie the Bartender | |
| 1956 | Tony Awardsas Self - Nominee |
