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).
Web Series & TV Shows
Watch What Happens Live with Andy Cohen
as Self - Guest
Law & Order
as Rickie the Bartender
The Late Late Show with Craig Ferguson
as Self
The West Wing
as Kate Harper
Jimmy Kimmel Live!
as Self
Law & Order: Criminal Intent
as Mary Shannon
The Pitt
as Dr. Linda Conley
ER
as Debbie
The Tonight Show with Jay Leno
The Ellen DeGeneres Show
as Self
