The nine of you old enough to remember Saved By the Bell will appreciate this.
Appearing on Late Night With Jimmy Fallon to promote his new TNT show, Raising the Bar, Mark-Paul Gosselaar appeared in character ... as Zack Morris.
"I had to change my name to Mark-Paul Gosselaar because there was already a Zack Morris in SAG," Zack explained to the lame host, who played along.
Zack / Mark-Paul went on to reflect on his amazing SATs, his terrific summer working at the Malibu Sands and his ill-fated marriage (!) to Kelly Kapowski.
He then arranged a class reunion (as did Jessie Spano, via circa 1991 cell phone) and even joined the Late Night band for a number as "Zack Attack."
Check out this blast from the Saturday morning past below ...