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Mary Marg Helgenberger 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 roles as Catherine Willows in the CBS police procedural drama CSI: Crime Scene Investigation and the subsequent TV movie Immortality (2015) and as 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.
Birth Name
Mary Marg Helgenberger
Born
Sunday, 16 November 1958
Links
Actress Filmography
| Title | Character | Year |
|---|
| Bonnie | (archive footage) | 2022 |
| CSI: Vegas | Catherine Willows | 2021 |
| Stand Up to Cancer | Self | 2021 |
| All Rise | Lisa Benner | 2019 |
| This Changes Everything | Self | 2019 |
| A Dog's Journey | Hannah / Hannah Montgomery | 2019 |
| Almost Friends | Samantha | 2017 |
| CSI: Immortality | Catherine Willows | 2015 |
| The 69th Annual Tony Awards | Self - Presenter | 2015 |
| The Rich Eisen Show | Self | 2014 |
Actress Filmography
| Title | Character | Year |
|---|
| Bonnie | (archive footage) | 2022 |
| CSI: Vegas | Catherine Willows | 2021 |
| Stand Up to Cancer | Self | 2021 |
| All Rise | Lisa Benner | 2019 |
| This Changes Everything | Self | 2019 |
| A Dog's Journey | Hannah / Hannah Montgomery | 2019 |
| Almost Friends | Samantha | 2017 |
| CSI: Immortality | Catherine Willows | 2015 |
| The 69th Annual Tony Awards | Self - Presenter | 2015 |
| The Rich Eisen Show | Self | 2014 |
| Celebrity Name Game | Self - Celebrity Player | 2014 |
| Intelligence | Lillian Strand | 2014 |
| The Queen Latifah Show | Self | 2013 |
| Celebrity Page | Self | 2013 |
| Under the Dome | Christine Price | 2013 |
| Home & Family | Self | 2012 |
| A Farewell to Marg | Self | 2012 |
| Stand Up to Cancer | Self | 2012 |
| Larry King Now | Self - Guest | 2012 |
| CBS This Morning | Self | 2012 |
| The Talk | Self | 2010 |
| Wonder Woman | Hera / Hera (voice) | 2009 |
| RuPaul's Drag Race | Self - Guest Judge / Self | 2009 |
| RuPaul's Drag Race: Untucked! | Self - Guest Judge | 2009 |
| Stand Up to Cancer | Self | 2008 |
| Stand Up to Cancer | 2008 | |
| Columbus Day | Alice | 2008 |
| The 61st Annual Tony Awards | Self - Presenter | 2007 |
| Mr. Brooks | Emma Brooks | 2007 |
| Rachael Ray | Self | 2006 |
| Hell's Kitchen | Self - Restaurant Patron | 2005 |
| In Good Company | Ann / Ann Foreman | 2005 |
| The Late Late Show with Craig Ferguson | Self / Self - Excerpt Reader | 2005 |
| The Tony Danza Show | Self | 2004 |
| TV Land Moguls | Self | 2004 |
| Partners | Eve Darrin | 2004 |
| The 46th Annual Grammy Awards | Self - Presenter | 2004 |
| The Wayne Brady Show | Self | 2002 |
| Project Greenlight | Self | 2001 |
| CSI: Crime Scene Investigation | CSI Catherine Willows / Catherine Willows | 2000 |
| Erin Brockovich | Donna Jensen | 2000 |
| CBS Cares | Self | 2000 |
| Lethal Vows | Ellen Farris | 1999 |
| Happy Face Murders | Jen Powell | 1999 |
| Species II | Dr. Laura Baker / Laura | 1998 |
| The Greatest | Self | 1998 |
| Gold Coast | Karen DiCilia | 1997 |
| Fire Down Below | Sarah Kellogg | 1997 |
| The Last Time I Committed Suicide | Lizzy | 1997 |
| King of the Hill | Mrs. Hanover / Pretty Student | 1997 |
| My Fellow Americans | Joanna | 1996 |
| The Daily Show | Self | 1996 |
| The Rosie O'Donnell Show | Self | 1996 |
| Conundrum | Det. Rose Ekberg | 1996 |
| Species | Dr. Laura Baker | 1995 |
| Bad Boys | Alison Sinclair | 1995 |
| Just Looking | Darlene Carpenter / Darlene | 1995 |
| ER | Karen Hines | 1994 |
| Where Are My Children? | Vanessa Meyer Vernon Scott | 1994 |
| Extra | Self | 1994 |
| The Cowboy Way | Margarette | 1994 |
| Red Eagle | Kate Nessen | 1994 |
| Keys | Maureen 'Kick' Kickasola | 1994 |
| Frasier | Emily | 1993 |
| Late Night with Conan O'Brien | Self / Self - Guest | 1993 |
| Late Show with David Letterman | Herself - Guest | 1993 |
| Fallen Angels | Eve Cressy | 1993 |
| When Love Kills: The Seduction of John Hearn | Debbie Banister | 1993 |
| Distant Cousins | Connie | 1993 |
| The Tommyknockers | Roberta 'Bobbi' Anderson | 1993 |
| Partners | Georgeanne Bidwell | 1993 |
| Through the Eyes of a Killer | Laurie Fisher | 1992 |
| The Larry Sanders Show | Susan Elliot | 1992 |
| The Hidden Room | Jane | 1991 |
| Death Dreams | Crista Westfield | 1991 |
| Crooked Hearts | Jennetta | 1991 |
| Blind Vengeance | Virginia Whitelaw | 1990 |
| Always | Rachel | 1989 |
| After Midnight | Alex (segment "All Night Operator") | 1989 |
| Tales from the Crypt | Vicki | 1989 |
| China Beach | KC Koloski / K.C. Kolowski | 1988 |
| Thirtysomething | Cooper | 1987 |
| Karen's Song | Francie | 1987 |
| Shell Game | Natalie Thayer | 1987 |
| Matlock | Victoria Rollins / Laura Norwood | 1986 |
| Spenser: For Hire | Nancy Kettering | 1985 |
| Entertainment Tonight | Self | 1981 |
| Ryan's Hope | Siobhan Ryan Novak | 1975 |
| Year | Type | Category | Won |
|---|
| 2003 | Golden Globe | Best Performance by an Actress in a Television Series - Drama | Nominated |
| 2003 | Emmy | Outstanding Lead Actress in a Drama Series | Nominated |
| 2002 | Golden Globe | Best Performance by an Actress in a Television Series - Drama | Nominated |
| 2001 | Emmy | Outstanding Lead Actress in a Drama Series | Nominated |
| 1992 | Emmy | Outstanding Supporting Actress in a Drama Series | Nominated |
| 1991 | Golden Globe | Best Performance by an Actress in a Supporting Role in a Series, Miniseries or Motion Picture Made for Television | Nominated |
| 1991 | Emmy | Outstanding Supporting Actress in a Drama Series | Nominated |
| 1990 | Emmy | Outstanding Supporting Actress in a Drama Series | Won |
