Marg Helgenberger is a film and television actress 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. She earned two Emmy Award and two Golden Globe nominations for her work on CSI. In 2005, she won the People’s Choice Award for Favorite Female Television Star and CSI received the Screen Actors Guild’s Outstanding Performance by an Ensemble in a Drama Series.

Marg was born in Fremont, Neb., and raised in North Bend, Neb. She attended Kearney State College (now the University of Nebraska-Kearney) and then Northwestern University, where she earned a Bachelor of Science degree in speech and drama.

Her other television credits include “Spenser for Hire,” “Matlock” and “thirtysomething.” She made her feature film debut in “After Midnight” in 1989. Her other film credits include Steven Spielberg’s “Always,” “A Guy Named Joe,” “In Good Company,” and “Mr. Brooks.” She also appeared for four years as Siobhan Ryan Novak in the soap opera “Ryan’s Hope.”

As a result of her mother’s 27-year battle against breast cancer, Helgenberger has hosted an annual benefit annually in Omaha since 1999.

In 2012, she received a star on the Hollywood Walk of Fame.

She began starring in the CBS series All Rise in 2019, which looks at the personal and professional lives of the judges, lawyers, clerks, baliffs and cops who work at an L.A. County courthouse.