Happy Birthday to Saturday morning manhunk, Mark-Paul Gosselaar, who turns a nifty 50 today! He’s most known for his breakthrough role of Zack Morris, which he played on the late 80s/early 90’s shows Good Morning, Miss Bliss and Saved By The Bell. Zack was a scheming student with bleach blond surfer hair and a penchant for trouble that gained him seemingly perpetual popularity, and turned Mark-Paul into a teen heartthrob. So when did this Gen X hottie go nude?

Celebrate Mark-Paul Gosselaar’s Milestone Birthday With Nude Pics!Sa

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Mark-Paul Gosselaar Nude

He returned to the role a number of times for TV movies, spinoffs, guest spots, and even a recent reboot, but like most young stars he was also keen to shake off his squeaky clean image with some hot nudity. Following in the footsteps of fellow child actor Ricky - sorry, RICK Schroeder - Mark-Paul flashed his ass for the first time when he joined the late night cop dramaNYPD Blue.

Celebrate Mark-Paul Gosselaar’s Milestone Birthday With Nude Pics!Celebrate Mark-Paul Gosselaar’s Milestone Birthday With Nude Pics!Celebrate Mark-Paul Gosselaar’s Milestone Birthday With Nude Pics!

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He kept the booty train going by during a kinky sex scene on an episode of the Showtime series Weeds' sixth season, and brought his butt back for the premiere episode of the truly underrated comedy Franklin & Bash, which he co-starred in with Breckin Meyer.

Celebrate Mark-Paul Gosselaar’s Milestone Birthday With Nude Pics!Celebrate Mark-Paul Gosselaar’s Milestone Birthday With Nude Pics!

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Still a bonafide babe at fifty, Mark-Paul’s been able to keep his career going strong while sharing a fondness for the (albeit problematic) role that put him on the map, and even poke fun at himself at times. And speaking of poking, our birthday wish for him is that he moves from showing his Bayside to finally showing his front side!