There aren’t many people who wouldn’t immediately recognize the major cast members of Saved by the Bell.

The hit show, which ran from 1989 until 1993, introduced audiences to the quirky ongoings at Bayside High School, creating a highly entertaining product that lasts long in the memory of all who watched it during its run.

Not only was Saved by the Bell hilariously funny, but it also touched on serious issues on occasion, including drug use, homelessness, women’s rights and driving under the influence.

What’s more, its lead actors and actresses became stars virtually overnight, rising from obscurity to enjoy immense popularity. Of all the characters who were loved by audiences, though, there can be no doubting that Zack Morris held a special place in our hearts.

Which is why we were so taken back when we saw the transformation the actor who played him –Mark-Paul Gosselaar – has undergone. Gosselaar is 49 today, and just sit down before you see him…

You might not recognize the name Mark-Paul Gosselaar, but you’ll surely remember Zack Morris. The cheeky, lovable rogue was arguably the main character of Saved by the Bell, and certainly amongst the most popular.

Put simply, he was the kid every young boy dreamed of being. Mischievous, bold, and full of tricks, yet able to charm teachers and the school principal to somehow always get off the hook.

Zach was portrayed – excellently, we might add – by Mark-Paul Gosselaar, who first took on the role in 1989, aged 14.