About
Mary McCormack
Overview
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
Acting |
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| 2025 | Vicious | Actor | 58 Average |
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| 2023 | National Memorial Day Concert | Actor | Self | 58 Average |
| 2021 | Heels | Actor | Willie Day | 72 Good |
| 2020 | Unpregnant | Actor | Debra Clarke | 62 Fair |
| 2019 | Still Laugh-In: The Stars Celebrate | Actor | Self | 58 Average |
| 2019 | Treehouse | Actor | Lilith | 58 Average |
| 2018 | The Kids Are Alright | Actor | Peggy Cleary | 69 Fair |
| 2017 | Drone | Actor | Ellen | 56 Average |
| 2017 | Loaded | Actor | Casey | 68 Fair |
| 2017 | Alien Code | Actor | Rebecca | 58 Average |
| 2017 | The Crash | Actor | Sarah Schwab | 57 Average |
| 2016 | An American Girl Story: Maryellen 1955 - Extraordinary Christmas | Actor | Kay Larkin | 59 Average |
| 2016 | A Country Called Home | Actor | Amanda | 58 Average |
| 2014 | Scooby-Doo! WrestleMania Mystery | Actor | Ms. Richards (voice) | 64 Fair |
| 2013 | Welcome to the Family | Actor | Caroline Yoder | 68 Fair |
| 2013 | Escape from Polygamy | Actor | Leann | 59 Average |
| 2012 | Should've Been Romeo | Actor | Ellen | 58 Average |
| 2012 | The Unprofessional | Actor | Hilary Pfeiffer-Dunne | N/A N/A |
| 2008 | In Plain Sight | Actor | Mary Shannon | 69 Fair |
| 2007 | 1408 | Actor | Lilly Enslin | 66 Fair |
| 2006 | For Your Consideration | Actor | Pilgrim Woman | 58 Average |
| 2006 | Right at Your Door | Actor | Lexi | 58 Average |
| 2005 | Madison | Actor | Bonnie McCormick | 58 Average |
| 2004 | Traffic | Actor | Carole McKay | 70 Good |
| 2003 | K Street | Actor | Maggie Morris | 67 Fair |
| 2003 | Dickie Roberts: Former Child Star | Actor | Grace Finney | 56 Average |
| 2002 | Full Frontal | Actor | Linda | 56 Average |
| 2002 | World Traveler | Actor | Margaret | 58 Average |
| 2001 | K-PAX | Actor | Rachel Powell | 69 Fair |
| 2001 | High Heels and Low Lifes | Actor | Frances | 58 Average |
| 2001 | BigLove | Actor | Phoebe | 59 Average |
| 2000 | East of A | Actor | Daphne | N/A N/A |
| 2000 | Gun Shy | Actor | Gloria Nesstra | 57 Average |
| 2000 | The Broken Hearts Club: A Romantic Comedy | Actor | Anne | 59 Average |
| 2000 | Other Voices | Actor | Anna | 58 Average |
| 1999 | The Big Tease | Actor | Monique | 58 Average |
| 1999 | Mystery, Alaska | Actor | Donna Biebe | 59 Average |
| 1999 | The West Wing | Actor | Kate Harper | 81 Very good |
| 1999 | True Crime | Actor | Michelle Ziegler | 62 Fair |
| 1999 | Harvest | Actor | Agent Becka Anslinger | N/A N/A |
| 1999 | Getting to Know You | Actor | Leila Lee | 59 Average |
| 1998 | The Alarmist | Actor | Sally | 58 Average |
| 1998 | 54 | Actor | New Year's Eve Wife (uncredited) | 58 Average |
| 1998 | Deep Impact | Actor | Andrea Baker | 61 Fair |
| 1997 | Fathers' Day | Actor | Virginia Farrell (uncredited) | 57 Average |
| 1997 | Private Parts | Actor | Alison Stern | 61 Fair |
| 1997 | Colin Fitz | Actor | Moira | 58 Average |
| 1995 | Murder One | Actor | Justine Appleton | 72 Good |
| 1995 | The Wright Verdicts | Actor | Beth Eckhart | N/A N/A |
| 1995 | Backfire! | Actor | Sarah Jackson | 58 Average |
| 1994 | Miracle on 34th Street | Actor | Myrna Foy | 65 Fair |