Mike Guastella/Getty ImagesMarg Helgenberger is ready to cut the legal cord.
The CSI star has filed for divorce from her husband of 19 years, Screen Actors Guild president Alan Rosenberg.
The reason given was irreconcilable differences, according to the short-and-simple petition filed Tuesday in Los Angeles Superior Court.
Helgenberger and Rosenberg announced their separation in December, saying they had "decided to take some time apart."
"They love and respect each other and remain committed to their family," a rep for the 50-year-old actress said in a statement at the time.
The duo tied the knot in September 1989 and have an 18-year-old son, Hugh.