Marg Helgenberger

 Mary Marg Helgenberger, born on 16 November 1958, is an American actress from the United States. Her professional career began in the late 1980s. She first became famous for her character in Siobhan Ryan in the daytime soap which ran from 1982 until 1986. Her role in the role of Catherine Willows, a CBS police procedural drama CSI: Crime Scene Investigation (2000-13) as well as the subsequent television movie Immortality (2015) and and K.C. are her most well-known. She is most well-known for her role as Catherine Willows on the CBS drama series police procedural CSI: Crime Scene Investigation (2000-13) and the following TV film Immortality (2015). Her mother Mary Kay Bolte was a nurse, and her father Hugh Helgenberger was a meat inspector. Her birthplace was North Bend, Nebraska and was a graduate of North Bend Central High School. Helgenberger is of German and Irish origin. Her family was Roman Catholic and has one older sister, Ann, and one younger brother, Curt.