Marg Helgenberger & Hubby Split

In a move sure to make her male CSI fans hopeful, Marg Helgenberger has filed for divorce from husband Alan Rosenberg, TMZ is reporting.

The divorce papers from L.A. County Superior Court cite Marg as listing irreconcilable differences in her marriage to the president of the Screen Actors Guild. While she is just now filing, Marg and her hubby have been separated since December.

The former couple have a good 20 years under their belts, a rarity in Hollywood – they were married in 1989.