Mark-Paul Gosselaar is officially back on the market ... now that a judge has finalized his divorce from Lisa Ann Russell.



The 37-year-old "Saved By the Bell" star married Russell back in 1996. They have two children together.

According to documents filed May 27 in L.A. County Superior Court, Mark -- who's playing a lawyer in his new show, "Franklin and Bash" -- worked out a private arrangement with Russell regarding  custody and spousal support.