Mike Guastella/Getty ImagesMarg Helgenberger is no longer the first lady of the Screen Actors Guild.
A rep for the CSI star has confirmed that the actress has split from her husband of nearly two decades, SAG president and fellow thespian Alan Rosenberg.
"After 19 years of marriage, Marg and Alan have decided to take some time apart," her rep said in a statement. "They love and respect each other and remain committed to their family."
No reason was given for the separation.
Rosenberg, 57, and Helgenberger, who turned 50 just two weeks ago, have one child together, 18-year-old son Hugh.
The camera-ready couple tied the knot in September 1989 after meeting as costars on the soap opera Ryan's Hope. The duo reteamed onscreen in recent years, with Rosenberg having guest-starred in multiple episodes of CSI.