The pair "love and respect each other," a rep tells PEOPLE, but "decided to take some time off"

By Mike Fleeman
Updated December 01, 2008 02:45 PM
Credit: Gregg DeGuire/Wireimage

CSI star Marg Helgenberger has separated from her husband of nearly 20 years, actor Alan Rosenberg.

“After 19 years of marriage, Marg and Alan have decided to take some time apart,” the actress’s rep told PEOPLE on Monday. “They love and respect each other and remain committed to their family.”

Helgenberger, 50, and Rosenberg, 57, have an 18-year-old son.

Rosenberg is also president of the 120,000-member Screen Actors Guild, which is at an impasse in contract negotiations with the studios, with the possibility of a strike looming.