By Sandra Gonzalez, CNN

(CNN) -- The cast of "Saved By the Bell" wants everyone to know they really did stay friends forever.

Four of the six main cast members from the beloved '90s teen show staged a casual reunion over the weekend, meeting up for dinner at a French restaurant in Sherman Oaks, CA.

"This is what 30+ years of friendship looks like..." Mark-Paul Gosselaar, who played Zack Morris on the series, captioned a photo posted to his Instagram.

Tiffani Thiessen, who played cheerleader Kelly Kapowski, posted the same photo but wrote, "Friends forever," a nod to the song by the show's fictional band Zack Attack.

Thiessen and Gosselaar were joined by Mario Lopez and Elizabeth Berkley, who played A.C. Slater and Jessie Spano, respectively. Their spouses also joined the fun.

Missing from the group were Dustin Diamond and Lark Voorhies, who rounded out the core cast of the comedy.

In 2015, the same group of cast members came together for a surprise sketch on "The Tonight Show with Jimmy Fallon." For that reunion, they were joined by Dennis Haskins, who played principal Mr. Belding.

"Saved By the Bell," which premiered August 20,1989, will celebrate its 30th anniversary later this year.