Mary Margaret "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), the subsequent television film Immortality (2015), and the second and third seasons of the sequel series CSI: Vegas (2022–2024). 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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Early life
Helgenberger was born November 16, 1958, in Fremont, Nebraska, to Mary Kay (née Bolte), a nurse, and Hugh Helgenberger, a meat inspector. She has an older sister Ann and a younger brother Curt.
They are of Irish and German descent and had a Roman Catholic upbringing. They were raised in North Bend, Nebraska. She graduated from North Bend Central High School, where she played the French horn in its marching band.
Until college, Helgenberger aspired to be a nurse like her mother. She attended Kearney State College (now the University of Nebraska at Kearney) in Kearney, Nebraska, then Northwestern University's School of Speech (now the School of Communication) in Evanston, Illinois, earning a B.S. degree in speech and drama.
Career
Helgenberger began as a nightly weathergirl at KHGI-TV, the ABC affiliate in Kearney, while attending college (her name was changed by the producer to Margi McCarty. McCarty was her grandmother's maiden name). During the summer, she also worked as a deboner at her father's meatpacking plant. After portraying the role of Blanche Dubois in a university production of A Streetcar Named Desire, she developed an interest in acting.
While performing in a summer 1981 NU campus production of Shakespeare's Taming of the Shrew, where she played Kate, Helgenberger was spotted by a scout for the TV soap opera Ryan's Hope.
Soon after completing college, Helgenberger landed her first professional role on the long-running ABC Daytime soap opera in March 1982, playing amateur cop Siobhan Ryan Novak DuBujak, a role previously played by Ann Gillespie. After nearly four years, Helgenberger left the show in January 1986 to pursue new opportunities.
Helgenberger guest-starred in episodes of the ABC series Spenser: For Hire, NBC's Matlock, and ABC's thirtysomething. She also played a regular role as Natalie Thayer, opposite Margot Kidder and James Read, on the six-episode drama comedy series Shell Game (1987).
She then starred as Karen Charlene "K.C." Koloski, a prostitute turned entrepreneur, on the ABC war drama series China Beach from 1988 to 1991. The role earned her an Emmy Award for Outstanding Supporting Actress in a Drama Series in 1990.
In 1989, Helgenberger made her feature-film debut in a leading role as an all-night answering-service operator in one segment of the Wheat brothers' horror anthology After Midnight. She followed it up with a role in Steven Spielberg's romantic comedy-drama Always (starring Richard Dreyfuss, Holly Hunter, and John Goodman), a modern version of the original 1943 Victor Fleming film A Guy Named Joe.
During the early to mid-1990s, Helgenberger played the love interest to Woody Harrelson's character in The Cowboy Way (1994), and had a small role as Capt. Alison Sinclair in Michael Bay's action comedy film Bad Boys (1995). She also played Dr. Laura Baker, a molecular biologist, in Roger Donaldson's science-fiction thriller, Species (1995), and reprised the role in a sequel, Species II (1998).
Personal life
In 1984, Helgenberger met Alan Rosenberg, a guest actor on Ryan's Hope. The two became friends and started dating in 1986. They married in 1989 and have one son, Hugh Howard Rosenberg (b. 1990), named after Helgenberger's late father. On December 1, 2008, the couple announced that they were separating, and on March 25, 2009, Helgenberger filed for divorce. Their divorce was finalized in February 2010.
As a result of Helgenberger's mother's 27-year battle against breast cancer, Helgenberger and Rosenberg became involved in breast-cancer-related charity and have hosted a benefit Marg and Alan's Celebrity Weekend annually in Omaha, Nebraska, since 1999.
In April 2022, Helgenberger married Charlie Haugk, with whom she had been in a relationship since the fall of 2019.
