Mary McCormack
Biography
Mary McCormack is an American actress born on February 8, 1969, in Plainfield, New Jersey, USA. She has had a career in acting with 77 known credits. McCormack has appeared in various television series, including Murder One, The West Wing, In Plain Sight, and The Kids Are Alright. She has also been known by the name Mary Catherine McCormack. McCormack's acting credits span multiple genres and roles, with a notable presence in television.
Career overview
Mary McCormack is an American actress. She has had a career in the entertainment industry with numerous roles in television and film. McCormack's early work includes a leading role as Justine Appleton on the series Murder One. She went on to appear in other notable television shows.
In addition to her work on Murder One, McCormack has had significant roles in other series. She played the part of Deputy National Security Adviser Kate Harper on The West Wing, and later took on the role of Deputy U.S. Marshal Mary Shannon on In Plain Sight. McCormack's performances have been recognized in various television shows throughout her career.
McCormack has also appeared in a comedy series, The Kids Are Alright, where she played the character Peggy. Her acting credits span multiple genres and formats, showcasing her versatility as an actress. With a career spanning several decades, Mary McCormack has established herself as a talented and accomplished performer in the entertainment industry.
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Frequent co-stars
Career timeline
Full filmography
- The Pitt (2025) as Dr. Linda Conley
- Vicious (2025) as Mother
- National Memorial Day Concert (2023) as Self
- Heels (2021) as Willie Day
- Unpregnant (2020) as Debra Clarke
- The L Word: Generation Q (2019) as Anne Finley
- Treehouse (2019) as Lilith
- Still Laugh-In: The Stars Celebrate (2019) as Self
- 25 Words or Less (2018) as Self
- 25 Words or Less (2018)
- 25 Words or Less (2018) as Mary McCormack
- For the People (2018) as Chloe Daniels
- The Kids Are Alright (2018) as Peggy Cleary
- Will & Grace (2017) as Janet
- Drone (2017) as Ellen
- Loaded (2017) as Casey
- The Crash (2017) as Sarah Schwab
- Alien Code (2017) as Rebecca
- Chelsea (2016) as Self
- Match Game (2016) as Self - Panelist
- To Tell the Truth (2016) as Self - Panelist
- Divorce (2016) as Kathy DeSantis
- Angie Tribeca (2016) as Abigail Liukin
- Chelsea Does (2016) as Herself
- A Country Called Home (2016) as Amanda
- An American Girl Story: Maryellen 1955 - Extraordinary Christmas (2016) as Kay Larkin
- Scooby-Doo! WrestleMania Mystery (2014) as Ms. Richards (voice)
- Escape from Polygamy (2013) as Leann
- Welcome to the Family (2013) as Caroline Yoder
- Scandal (2012) as Lisa Elliot
- The Newsroom (2012) as Molly Levy
- House of Lies (2012) as Denna Altshuler
- Should've Been Romeo (2012) as Ellen
- The Unprofessional (2012) as Hilary Pfeiffer-Dunne
- Watch What Happens Live with Andy Cohen (2009) as Self - Guest
- Late Night with Jimmy Fallon (2009) as Self
- In Plain Sight (2008) as Mary Shannon
- 1408 (2007) as Lilly Enslin
- For Your Consideration (2006) as Pilgrim Woman
- Right at Your Door (2006) as Lexi
- The Late Late Show with Craig Ferguson (2005) as Self
- Madison (2005) as Bonnie McCormick
- Traffic (2004) as Carole McKay
- Jimmy Kimmel Live! (2003) as Self
- The Ellen DeGeneres Show (2003) as Self
- K Street (2003) as Maggie Morris
- Dickie Roberts: Former Child Star (2003) as Grace Finney
- Full Frontal (2002) as Linda
- World Traveler (2002) as Margaret
- Law & Order: Criminal Intent (2001) as Mary Shannon
- K-PAX (2001) as Rachel Powell
- BigLove (2001) as Phoebe
- High Heels and Low Lifes (2001) as Frances
- Gun Shy (2000) as Gloria Nesstra
- The Broken Hearts Club: A Romantic Comedy (2000) as Anne
- Other Voices (2000) as Anna
- East of A (2000) as Daphne
- The West Wing (1999) as Kate Harper
- The Late Late Show with Craig Kilborn (1999) as Self - Guest
- Getting to Know You (1999) as Leila Lee
- True Crime (1999) as Michelle Ziegler
- Harvest (1999) as Agent Becka Anslinger
- Mystery, Alaska (1999) as Donna Biebe
- The Big Tease (1999) as Monique
- Deep Impact (1998) as Andrea Baker
- 54 (1998) as New Year's Eve Wife (uncredited)
- The Alarmist (1998) as Sally
- Private Parts (1997) as Alison Stern
- Fathers' Day (1997) as Virginia Farrell (uncredited)
- Colin Fitz (1997) as Moira
- Murder One: Diary of a Serial Killer (1997) as Justine Appleton
- Murder One (1995) as Justine Appleton
- Backfire! (1995) as Sarah
- The Wright Verdicts (1995) as Beth Eckhart
- ER (1994) as Debbie
- Miracle on 34th Street (1994) as Myrna Foy
- The Tonight Show with Jay Leno (1992)
- Law & Order (1990) as Rickie the Bartender
- Tony Awards (1956) as Self - Nominee