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Mary McCormack, an American actress with a career marked by notable television roles, has played Justine Appleton in the legal drama series "Murder One" and Deputy National Security Adviser Kate Harper in "The West Wing," before taking on the role of Deputy U.S. Marshal Mary Shannon in the comedic Western series "In Plain Sight." More recently, she has portrayed Peggy in the family sitcom "The Kids Are Alright," each role showcasing her versatility and range in television.
The roles that explain the career.
34 credits across 1 departments.
| Year | Title | Role | Type |
|---|---|---|---|
| 2025 | Vicious | Mother | Film |
| 2020 | Unpregnant | Debra Clarke | Film |
| 2019 | Still Laugh-In: The Stars Celebrate | Self | Film |
| 2019 | Treehouse | Lilith | Film |
| 2017 | Drone | Ellen | Film |
| 2014 | Scooby-Doo! WrestleMania Mystery | Ms. Richards (voice) | Film |
| 2012 | Should've Been Romeo | Ellen | Film |
| 2008 | In Plain Sight | Mary Shannon | TV |
| 2007 | 1408 | Lilly Enslin | Film |
| 2006 | Right at Your Door | Lexi | Film |
| 2005 | Madison | Bonnie McCormick | Film |
| 2004 | Traffic | Carole McKay | TV |
| 2003 | Dickie Roberts: Former Child Star | Grace Finney | Film |
| 2003 | K Street | Maggie Morris | TV |
| 2002 | World Traveler | Margaret | Film |
| 2002 | Full Frontal | Linda | Film |
| 2001 | K-PAX | Rachel Powell | Film |
| 2001 | High Heels and Low Lifes | Frances | Film |
| 2000 | Gun Shy | Gloria Nesstra | Film |
| 2000 | The Broken Hearts Club: A Romantic Comedy | Anne | Film |
| 2000 | Other Voices | Anna | Film |
| 1999 | Mystery, Alaska | Donna Biebe | Film |
| 1999 | The Big Tease | Monique | Film |
| 1999 | Getting to Know You | Leila Lee | Film |
| 1999 | True Crime | Michelle Ziegler | Film |
| 1999 | Harvest | Agent Becka Anslinger | Film |
| 1999 | The West Wing | Kate Harper | TV |
| 1998 | Deep Impact | Andrea Baker | Film |
| 1998 | The Alarmist | Sally | Film |
| 1997 | Private Parts | Alison Stern | Film |
| 1997 | Colin Fitz | Moira | Film |
| 1995 | Murder One | Justine Appleton | TV |
| 1995 | Backfire! | Sarah | Film |
| 1994 | Miracle on 34th Street | Myrna Foy | Film |
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