Mary McCormack

Explore Mary McCormack’s films. Browse credits and ratings, see where to watch, and find your next movie with ReelBot.

Acting

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).

Filmography

• Vicious (2025)
• National Memorial Day Concert (2023)
• Unpregnant (2020)
• Still Laugh-In: The Stars Celebrate (2019)
• Treehouse (2019)
• Drone (2017)
• Alien Code (2017)
• The Crash (2017)
• An American Girl Story: Maryellen 1955 - Extraordinary Christmas (2016)
• A Country Called Home (2016)
• Scooby-Doo! WrestleMania Mystery (2014)
• Escape from Polygamy (2013)
• Should've Been Romeo (2012)
• The Unprofessional (2012)
• 1408 (2007)
• For Your Consideration (2006)
• Right at Your Door (2006)
• Madison (2005)
• Dickie Roberts: Former Child Star (2003)
• Full Frontal (2002)
• World Traveler (2002)
• K-PAX (2001)
• High Heels and Low Lifes (2001)
• BigLove (2001)
• East of A (2000)
• Gun Shy (2000)
• The Broken Hearts Club: A Romantic Comedy (2000)
• Other Voices (2000)
• The Big Tease (1999)
• Mystery, Alaska (1999)
• True Crime (1999)
• Harvest (1999)
• Getting to Know You (1999)
• The Alarmist (1998)
• 54 (1998)
• Deep Impact (1998)
• Murder One: Diary of a Serial Killer (1997)
• Fathers' Day (1997)
• Private Parts (1997)
• Colin Fitz (1997)
• Backfire! (1995)
• Miracle on 34th Street (1994)