Marg Helgenberger
Born in Fremont, Nebraska, USA — Nov 16 1958
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Biography
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…
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Marg Helgenberger's Credits
Browse acting and crew credits across movies and TV — filter and sort to find specific roles.
CSI: Crime Scene Investigation
Catherine Willows
Frasier
Emily
ER
Karen Hines
RuPaul's Drag Race
Self - Guest Judge
King of the Hill
Mrs. Hanover / Pretty Student (voice)
Matlock
Victoria Rollins / Laura Norwood
Intimate Portrait
Self
All Rise
Lisa Benner
People's Choice Awards
Self - Presenter
Under the Dome
Christine Price
CSI: Vegas
Catherine Willows
Tales from the Crypt
Vicki
The Larry Sanders Show
Susan Elliot
The Price Is Right
Self
Stars in the House
Self
China Beach
KC Koloski
Fallen Angels
Eve Cressy
thirtysomething
Spenser: For Hire
Nancy Kettering
Bad Boys
Alison Sinclair
Intelligence
Lillian Strand
Species
Dr. Laura Baker
Almost Friends
Samantha
Erin Brockovich
Donna Jensen
Species II
Dr. Laura Baker
The Tommyknockers
Bobbi Anderson
Mr. Brooks
Emma Brooks
A Dog's Journey
Hannah Montgomery
Fire Down Below
Sarah Kellogg
Always
Rachel
Wonder Woman
Hera (voice)
In Good Company
Ann
This Changes Everything
Self
The Cowboy Way
Margarette
Perfect Murder, Perfect Town
Patsy Ramsey
The Last Time I Committed Suicide
Lizzy
Crooked Hearts
Jennetta
Columbus Day
Alice
My Fellow Americans
Joanna (uncredited)
After Midnight
Alex (segment "All Night Operator")
Lethal Vows
Ellen Farris
Giving Up the Ghost
Anna Hobson
In Sickness and in Health
Mickey
Perfect Murder, Perfect Town: JonBenét and the City of Boulder
Patsy Ramsey
Death Dreams
Crista Westfield
Shell Game
China Beach: Pilot
K.C. Kolowski
Keys
Maureen 'Kick' Kickasola
CSI: Immortality
Catherine Willows
Murder Live!
Pia Postman
Partners
Georgeanne Bidwell
Inflammable
Lt. (j.g.) Kay Dolan
Thanks of a Grateful Nation
Jerrilynn Folz
Happy Face Murders
Jen Powell
Gold Coast
Karen DiCilia
Conundrum
Det. Rose Ekberg
Blind Vengeance
Virginia Whitelaw
Just Looking
Darlene Carpenter
Peacemaker
Mrs. Cooper
Where Are My Children?
Vanessa Meyer Vernon Scott
Through the Eyes of a Killer
Laurie Fisher
When Love Kills: The Seduction of John Hearn
Debbie Banister
Distant Cousins
Connie
Lie Down with Lions
Kate Nessen
Tony Awards
Self - Presenter