Helgenberger was born November 16, 1958, inFremont, Nebraska, to Mary Kay (née Bolte), anurse, and Hugh Helgenberger, a meat inspector.[2] She has an older sister Ann and a younger brother Curt.They are of Irish and German descent[3] and had a Roman Catholic upbringing.[4] They were raised inNorth Bend, Nebraska. She graduated from North Bend Central High School, where she played theFrench horn in its marching band.[5]
Helgenberger began as a nightly weathergirl atKHGI-TV, theABC 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 ofBlanche Dubois in a university production ofA Streetcar Named Desire, she developed an interest in acting.[7]
While performing in a summer 1981 NU campus production ofShakespeare'sTaming of the Shrew, where she played Kate, Helgenberger was spotted by a scout for the TV soap operaRyan's Hope.[8]
Soon after completing college, Helgenberger landed her first professional role on the long-runningABC Daytime soap opera in March 1982, playing amateur copSiobhan Ryan Novak DuBujak, a role previously played byAnn Gillespie. After nearly four years, Helgenberger left the show in January 1986 to pursue new opportunities.
During the early to mid-1990s, Helgenberger played the love interest toWoody Harrelson's character inThe Cowboy Way (1994), and had a small role as Capt. Alison Sinclair inMichael Bay's action comedy filmBad Boys (1995). She also played Dr. Laura Baker, a molecular biologist, inRoger Donaldson's science-fiction thriller,Species (1995), and reprised the role in a sequel,Species II (1998).
In 2000, Helgenberger made a guest appearance in the Valentine's Day episode ofFrasier, in which Frasier (Kelsey Grammer) finally wears down his dad Martin's resistance and gets the older man to accompany him to the opera. Actually, this invitation is but a smokescreen, so that Frasier can "accidentally" run into his newest dream girl Emily (Helgenberger).
Starting in October 2000, Helgenberger starred in the role ofCatherine Willows, a former show girl employed as a blood-spatter analyst, on the hit CBS dramaCSI: Crime Scene Investigation. Her performance as the female lead has earned her two Emmy nominations and twoGolden Globe nominations. In 2005, she and her fellow cast members won theScreen Actors Guild Award for Outstanding Performance by an Ensemble in a Drama Series. WhenCSI first started filming, Helgenberger visited theClark County Coroner's Office to learn about her role, even viewing autopsies in progress. Helgenberger got the chance to act with her husband,Alan Rosenberg, when he guest-starred onCSI, season five ("Weeping Willows") and season seven ("Leaving Las Vegas").
Helgenberger picketing during Writers Guild strike in 2007
In 2006, Helgenberger's hometown ofNorth Bend, Nebraska, renamed the street on which Helgenberger had her childhood home "Helgenberger Avenue". In 2012, speaking toThe Daily Northwestern - the Northwestern University's main student newspaper - she recalled that, "It really is pretty special. When I went back for the unveiling of it, which was about five years ago, I was very touched by it. A lot of people turned out, and there was a program up at my high school where the students were doing scenes from shows that I had done."[9]
In April 2008, Helgenberger was chosen as an endorser of theGot Milk? campaign.[11]
In December 2009,Forbes magazine placed Helgenberger third among primetime's top-earning women, with estimated earnings of $9.5 million, afterTyra Banks andKatherine Heigl.[12]
Helgenberger received the 2,458th star on theHollywood Walk of Fame on January 23, 2012, for her television work.[13][14]
She lent her voice as Greek goddessHera to the straight-to-video animated filmWonder Woman.[15]
Helgenberger appeared in only the first 12 episodes of the 12th season ofCSI, as she wanted to return to the stage. The producers said they left the door open for Helgenberger if she wanted to return. Helgenberger left the show on January 25, 2012, during a two-part episode ("Ms. Willows Regrets" and "Willows in the Wind"). The last one was the most-watched episode of the season with 14.26 million viewers.[17]
Helgenberger also starred as Lilian Strand in the seriesIntelligence alongsideJosh Holloway andMeghan Ory.[18] Additionally, she briefly returned toCSI as Catherine for the 300th episode.[19] In February 2015, she joined the third season ofUnder the Dome.[20]
In 2022, Helgenberger became a series regular onCSI: Vegas, joining the show in its second season and reprising her long-running role ofCatherine Willows.
In 1984, Helgenberger metAlan Rosenberg, a guest actor onRyan'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.[23][24] Their divorce was finalized in February 2010.[25]
As a result of Helgenberger's mother's 27-year battle againstbreast cancer, Helgenberger and Rosenberg became involved in breast-cancer-related charity and have hosted a benefit Marg and Alan's Celebrity Weekend annually inOmaha, Nebraska, since 1999.[26]
In April 2022, Helgenberger married Charlie Haugk, whom she had been in a relationship with since the fall of 2019.[27]