- Source of Wealth: Film and Television
- Age: 61
- Birth Place: Fremont, Nebraska, U.S.
- Height: 5′ 6″ (1.68 m)
- Weight: 54 kg (117 lbs)
- Marital Status: Divorced (Alan Rosenberg)
- Full Name: Mary Marg Helgenberge
- Nationality: American
- Date of Birth: November 16, 1958
- Ethnicity: German and Irish
- Occupation: Actress
- Education: University of Nebraska and Northwestern University’s School of Speech
- Children: 1 (Hugh Howard)
Marg Helgenberger is a well-known actress on both film and television with an estimated worth of $16 million. Marg Helgenberger became popular because of her role as “Catherine Willows” in the drama “CSI: Crime Scene Investigation” shown through the US network CBS. She has noted appearances in the 2001 movie “Erin Brockovich” where she earned a “Favorite Actress in a Drama” nomination at the Blockbuster Entertainment Award and “Species” in 1995 which was her claim to fame.