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Mary McCormack

Acting Born Feb 8, 1969 Plainfield, New Jersey, USA 24 credits

Biography

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).

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Full filmography

  • Law & Order (1990) as Rickie the Bartender
  • Watch What Happens Live with Andy Cohen (2009) as Self - Guest
  • Law & Order: Criminal Intent (2001) as Mary Shannon
  • ER (1994) as Debbie
  • The West Wing (1999) as Kate Harper
  • The Pitt (2025) as Dr. Linda Conley
  • Scandal (2012) as Lisa Elliot
  • The Late Late Show with Craig Ferguson (2005) as Self
  • Tony Awards (1956) as Self - Nominee
  • Jimmy Kimmel Live! (2003) as Self
  • The Ellen DeGeneres Show (2003) as Self
  • The Tonight Show with Jay Leno (1992)
  • The Newsroom (2012) as Molly Levy
  • 25 Words or Less (2018) as Self
  • 25 Words or Less (2018)
  • 25 Words or Less (2018) as Mary McCormack
  • In Plain Sight (2008) as Mary Shannon
  • Angie Tribeca (2016) as Abigail Liukin
  • Murder One (1995) as Justine Appleton
  • Late Night with Jimmy Fallon (2009) as Self
  • Chelsea (2016) as Self
  • To Tell the Truth (2016) as Self - Panelist
  • Match Game (2016) as Self - Panelist
  • Will & Grace (2017) as Janet