Mark-Paul Gosselaar Splits With Wife

Mark Paul Gosselaar And Lisa Ann Russell

A broken-hearted Zack Morris is single!

After 13 years of marriage, Mark-Paul Gosselaar and wife Lisa Ann Russell have split, InTouch Weekly reports.

"He's taking it very hard," says an inside source, who adds: "This has been going on for quite some time now."

This being the tension between a more serious-minded, career-and-family-oriented Mark-Paul and a party-hardy Lisa. 6 Love Lessons From Saved By The Bell

Reportedly, a "very somber" Mark-Paul has been staying at home taking care of the kids while Lisa has been spotted out "partying around LA."

"Having children made me mature," he has said. Now, while Mark-Paul is focused on his children and his career comeback, Lisa seems to be on a different page. [Source: InTouch Weekly ]

The two met on the set of Saved by the Bell: The College Years, and have two children together, Michael, 6, and Ava, 4.

So where are best buddy A.C. Slater and girlfriend Kelly Kapowski to help him with his grief? Unfortunately, Tiffani-Amber Thiessen is married and pregnant now, leaving us with little hope for an off-screen meet-up for milkshakes at The Max. Likewise, Mario Lopez is equally distracted with a wife and child.

Don't worry, Zack, err, Mark-Paul, there will always be your legion of adoring fans to help you dry your eyes. And, of course, we hear Dustin "Screech" Diamond is looking for fun. Great, Kelly Kapowski Is Taken. Now What?

Photo via FamePictures/Juan Rico.