MM
Mary McCormack
Actor, Producer, Additional CreditsBorn February 8, 1969 (56 years)
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
Filmography
| 2025 | |
| 2021 | Heels (TV Series) · as Willie Day |
| 2020 | Unpregnant · as Debra Clarke |
| 2019 | The L Word: Generation Q (TV Series) · as Anne Finley |
| 2018 | Treehouse · as Lilith |
| 2018 | The Kids Are Alright (TV Series) · as Peggy Cleary |
| 2018 | Into the Dark (TV Series) · as Lilith |
| 2018 | Alien Code · as Rebecca |
| 2018 | For the People (2018) (TV Series) · as Chloe Daniels |
| 2017 | Will & Grace (TV Series) · as Janet |
| 2017 | |
| 2017 | Loaded (2017) (TV Series) · as Casey |
| 2017 | Nobodies (TV Series) · as Bitsy Hewitt-Bowles |
| 2017 | When We Rise (TV Series) · as Roberta Kaplan |
| 2017 | |
| 2016 | An American Girl Story: Maryellen 1955 - Extraordinary Christmas · as Kay Larkin |
| 2016 | Falling Water (TV Series) · as Taylor Bennett |
| 2016 | Divorce (2016) (TV Series) · as Kathy Desantis |
| 2016 | Angie Tribeca (TV Series) · as Abigail Liukin |
| 2015 | A Country Called Home · as Amanda |
| 2014 | Scooby-Doo! WrestleMania Mystery · as Ms. Richards (voice) |
| 2013 | Welcome to the Family (TV Series) · as Caroline Yoder |
| 2013 | Escape from Polygamy · as Leann |
| 2012 | The Newsroom (2012) (TV Series) · as Molly Levy |
| 2012 | Should've Been Romeo · as Ellen |
| 2012 | Scandal (2012) (TV Series) · as Lisa Elliot |
| 2012 | House of Lies (TV Series) · as Denna Altshuler |
| 2008 | In Plain Sight (TV Series) · as Mary Shannon |
| 2007 | 1408 · as Lilly Enslin |
| 2006 | For Your Consideration · as Pilgrim Woman |
| 2006 | Right at Your Door · as Lexi |
| 2004 | Traffic (TV Series) · as Carole Mckay |
| 2003 | K Street (TV Series) · as Maggie Morris |
| 2003 | Dickie Roberts: Former Child Star · as Grace Finney |
| 2002 | Full Frontal · as Linda |
| 2001 | World Traveler · as Margaret |
| 2001 | K-PAX · as Rachel Powell |
| 2001 | Law & Order: Criminal Intent (TV Series) · as Mary Shannon |
| 2001 | High Heels and Low Lifes · as Frances |
| 2001 | Madison · as Bonnie Mccormick |
| 2000 | |
| 2000 | East of A · as Daphne |
| 2000 | Gun Shy · as Gloria Nesstra |
| 2000 | Other Voices · as Anna |
| 1999 | The Big Tease · as Monique |
| 1999 | Mystery, Alaska · as Donna Biebe |
| 1999 | The West Wing (TV Series) · as Kate Harper |
| 1999 | Getting to Know You · as Leila Lee |
| 1999 | True Crime · as Michelle Ziegler |
| 1998 | Harvest · as Agent Becka Anslinger |
| 1998 | Will & Grace (TV Series) · as Janet Adler |
| 1998 | 54 · as New Year's Eve Wife (uncredited) |
| 1998 | Deep Impact · as Andrea Baker |
| 1997 | The Alarmist · as Sally |
| 1997 | Fathers' Day · as Virginia Farrell (uncredited) |
| 1997 | Private Parts · as Alison Stern |
| 1997 | Colin Fitz Lives! · as Moira |
| 1995 | Murder One (TV Series) · as Justine Appleton |
| 1995 | The Wright Verdicts (TV Series) · as Beth Eckhart |
| 1995 | Backfire! · as Sarah Jackson |
| 1994 | Miracle on 34th Street · as Myrna Foy |
| 1994 | ER (TV Series) · as Debbie |
| 1992 | The Tonight Show with Jay Leno (TV Series) |
| 1990 | Law & Order (TV Series) · as Rickie The Bartender |