Acting
Mary McCormack
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).
Titles
Watch What Happens Live with Andy Cohen
2009
Law & Order
1990
Law & Order: Criminal Intent
2001
The West Wing
1999
The Pitt
2025
The Late Late Show with Craig Ferguson
2005
Scandal
2012
Jimmy Kimmel Live!
2003
Tony Awards
1956
ER
1994
The Tonight Show with Jay Leno
1992
25 Words or Less
2018
The Ellen DeGeneres Show
2003
House of Lies
2012
Chelsea
2016
In Plain Sight
2008
Late Night with Jimmy Fallon
2009
The Newsroom
2012
Will & Grace
2017
The Late Late Show with Craig Kilborn
1999
Angie Tribeca
2016
Murder One
1995
To Tell the Truth
2016
Match Game
2016
Deep Impact
1998
The L Word: Generation Q
2019
1408
2007
Divorce
2016
Miracle on 34th Street
1994
For the People
2018
K-PAX
2001
Heels
2021
Vicious
2025
True Crime
1999
54
1998
Mystery, Alaska
1999