Discover
Mary Catherine McCormack is an American actress. She has had leading roles as Justine Appleton in the series Murder One (1995–97), as Deputy National Security Adviser Kate Harper in The West Wing (2004–06), as Mary Shannon in In Plain Sight (2008–12), and as Peggy in the comedy series The Kids Are Alright (2018–19).
Birth Name
Mary Catherine McCormack
Born
Saturday, 08 February 1969
Actress Filmography
| Title | Character | Year |
|---|
| Heels | Willie Day | 2021 |
| Unpregnant | Debra Clarke | 2020 |
| The L Word: Generation Q | Anne Finley | 2019 |
| Still Laugh-In: The Stars Celebrate | 2019 | |
| The Kids Are Alright | Peggy Cleary | 2018 |
| Into the Dark | Lilith | 2018 |
| 25 Words or Less | Self - Contestant | 2018 |
| Alien Code | Rebecca / Rebecca Stillman | 2018 |
| For The People | Chloe Daniels | 2018 |
| Will & Grace | Janet Adler | 2017 |
Actress Filmography
| Title | Character | Year |
|---|
| Heels | Willie Day | 2021 |
| Unpregnant | Debra Clarke | 2020 |
| The L Word: Generation Q | Anne Finley | 2019 |
| Still Laugh-In: The Stars Celebrate | 2019 | |
| The Kids Are Alright | Peggy Cleary | 2018 |
| Into the Dark | Lilith | 2018 |
| 25 Words or Less | Self - Contestant | 2018 |
| Alien Code | Rebecca / Rebecca Stillman | 2018 |
| For The People | Chloe Daniels | 2018 |
| Will & Grace | Janet Adler | 2017 |
| Drone | Ellen Wistin / Ellen | 2017 |
| Loaded | Casey | 2017 |
| Nobodies | Bitsy Hewitt-Bowles | 2017 |
| When We Rise | Roberta Kaplan | 2017 |
| The Crash | Sarah Schwab | 2017 |
| An American Girl Story: Maryellen 1955 - Extraordinary Christmas | Kay Larkin | 2016 |
| Falling Water | Taylor Bennett | 2016 |
| Divorce | Kathy DeSantis | 2016 |
| Match Game | Self - Celebrity Panelist | 2016 |
| To Tell the Truth | Self - Panelist | 2016 |
| A Country Called Home | Amanda | 2016 |
| Chelsea Does | Self | 2016 |
| Chelsea | Herself / Self / Herself (as Mary) | 2016 |
| Angie Tribeca | Abigail Liukin / Liukin | 2016 |
| Hollywood Today Live | Self | 2015 |
| Scooby-Doo! WrestleMania Mystery | Ms. Richards / Ms. Richards (voice) | 2014 |
| Celebrity Page | Self | 2013 |
| Welcome to the Family | Caroline Yoder | 2013 |
| Escape from Polygamy | Leann | 2013 |
| International Ghost Investigators | Mary McCormack | 2013 |
| The Newsroom | Molly Levy | 2012 |
| Should've Been Romeo | Ellen | 2012 |
| Scandal | Lisa Elliot | 2012 |
| House of Lies | Denna Altshuler | 2012 |
| National Memorial Day Concert | Self | 2011 |
| The Talk | Self / Self - Guest Co-Host | 2010 |
| Watch What Happens Live with Andy Cohen | Self | 2009 |
| Late Night with Jimmy Fallon | Herself - Guest | 2009 |
| The 62nd Annual Tony Awards | Self - Nominee | 2008 |
| In Plain Sight | Mary Shannon | 2008 |
| Chelsea Lately | Herself - Guest / Herself - Round Table / Herself - Guest Host / Self - Guest / Herself - Chelsea's Intervention | 2007 |
| 1408 | Lily / Lilly Enslin | 2007 |
| For Your Consideration | Pilgrim Woman | 2006 |
| Right at Your Door | Lexi | 2006 |
| The Late Late Show with Craig Ferguson | Self - Guest | 2005 |
| Traffic | Carole McKay | 2004 |
| Celebrity Poker Showdown | Self - Contestant | 2003 |
| K Street | Maggie Morris | 2003 |
| Dickie Roberts: Former Child Star | Grace Finney | 2003 |
| Full Frontal | Linda | 2002 |
| World Traveler | Margaret | 2002 |
| K-PAX | Rachel Powell | 2001 |
| Law & Order: Criminal Intent | Mary Shannon | 2001 |
| High Heels and Low Lifes | Frances | 2001 |
| Madison | Bonnie McCormick | 2001 |
| The Broken Hearts Club: A Romantic Comedy | Anne | 2000 |
| East of A | Daphne | 2000 |
| Gun Shy | Gloria Nesstra | 2000 |
| Other Voices | Anna | 2000 |
| The Big Tease | Monique | 1999 |
| Mystery, Alaska | Donna Biebe | 1999 |
| The West Wing | Kate Harper | 1999 |
| True Crime | Michelle Ziegler | 1999 |
| Harvest | Agent Becka Anslinger | 1999 |
| Getting to Know You | Leila Lee | 1999 |
| 54 | New Year's Eve Wife | 1998 |
| Deep Impact | Andrea Baker | 1998 |
| The Alarmist | Sally | 1998 |
| Fathers' Day | Virginia Farrell | 1997 |
| Murder One: Diary of a Serial Killer | Justine Appleton | 1997 |
| Private Parts | Alison Stern | 1997 |
| Colin Fitz Lives! | Moira | 1997 |
| Access Hollywood | Self | 1996 |
| Murder One | Justine Appleton | 1995 |
| The Wright Verdicts | Beth Eckhart | 1995 |
| Backfire! | Sarah Jackson | 1995 |
| Miracle on 34th Street | Myrna Foy | 1994 |
| ER | Debbie | 1994 |
| Late Night with Conan O'Brien | Herself - Guest | 1993 |
| Law & Order | Rickie | 1990 |
| Entertainment Tonight | Herself | 1981 |
Producer Filmography
| Title | Year |
|---|
| 25 Words or Less | 2018 |
| In Plain Sight | 2008 |
