Marg Helgenberger
Acting
Mary Marg Helgenberger (born November 16, 1958) is an American actress. She began her career in the early 1980s and first came to attention for playing the role of Siobhan Ryan on the daytime soap opera Ryan's Hope from 1982 to 1986. She is best known for her role as Catherine Willows in the CBS police procedural drama CSI: Crime Scene Investigation (2000–13) and the subsequent TV movie Immortality (2015). She reprised the role in the sequel CSI: Vegas (2022–present). Helgenberger is also known for playing the role of K.C. Koloski in the ABC drama China Beach (1988–91), which earned her the 1990 Emmy Award for Outstanding Supporting Actress in a Drama Series. She is also known for roles in the TV series Under the Dome and Intelligence, and the films Species (1995), Species II (1998), Erin Brockovich (2000), and Mr. Brooks (2007).
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Known For
CSI: Crime Scene Investigation
Frasier
The View
ER
Late Night with Conan O'Brien
King of the Hill
RuPaul's Drag Race
The Ellen DeGeneres Show
Matlock
The Price Is Right
Tales from the Crypt
Under the Dome
CSI: Vegas
All Rise
The Larry Sanders Show
Intelligence
Bad Boys
Erin Brockovich
Species
The Tommyknockers
Mr. Brooks
A Dog's Journey
Species II
Almost Friends
In Good Company
Always
Wonder Woman
Fire Down Below
CSI: Immortality
After Midnight
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