Mary 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) and the subsequent TV movie Immortality (2015). She reprised the role in the sequel CSI: Vegas (2022–present). 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). Description above from the Wikipedia article Marg Helgenberger, licensed under CC-BY-SA, full list of contributors on Wikipedia. Marg Helgenberger(1958년생, Fremont, Nebraska, USA) 는 배우로, 대표작으로 스피시즈, 에린 브로코비치, 안녕 베일리가 있으며, 그 외에도 CSI: 라스베가스, 프레이저, 킹 오브 더 힐, 루폴의 드래그 레이스, 골든 글로브상, The View, ER, American Playhouse, LIVE with Kelly and Mark, The Talk, 토니상, Late Night with Conan O'Brien 등 다양한 작품에 출연했다. (오뜨랑에서 실시간으로 번역된 한글 프로필도 확인할 수 있어요) 2025년 보스턴 블루에서 Gwen 역을 맡았다. 2021년 CSI: 베가스에서 Catherine Willows 역을 맡았다. 2020년 Stars in the House에 출연했다.