| First Name | Marg |
| Last Name | Helgenberger |
| Full Name at Birth | Mary Margaret Helgenberger |
| Age | 53 |
| Date of Birth | November 16, 1958 |
| Birthplace | Fremont, NE |
| Height | 5' 6" (168 cm) |
| Build | Average |
| Eye Color | Blue |
| Hair Color | Blonde |
| Star Sign | Scorpio |
| Religion | Roman Catholic |
| Ethnicity | White |
| Nationality | American |
| University | Kearney State College, Kearney, NESchool of Speech, Northwestern University, Evanston, IL |
| Occupation Category | Actress |
| Claim to Fame | China Beach, CSI: Crime Scene Investigation, Speci |
| Official Website | marghelgenberger.com |
Mary Marg Helgenberger (born November 16, 1958) is an American film and television actress, perhaps best known for her roles as Catherine Willows in the CBS drama CSI: Crime Scene Investigation, and as K.C. Koloski in the ABC drama China Beach, which earned her the 1990 Emmy Award for Outstanding Supporting Actress in a Drama Series.
Selected Marg Helgenberger film and TV show credits: