Fans of hit 90s show Saved By The Bell may have trouble recognising this much-loved star as he has a very different look three decades on from his stint at Bayside High School.
The Hollywood heartthrob, now 49, rose to fame playing cool kid Zack Morris and went on to find further success in TV shows such as Franklin & Bash and The Passage.
The star's character on Saved By The Bell was well-known for his blonde floppy hair and scheming ways and was the kid that everyone wanted to be.
But now the actor has ditched his iconic look and gone for a head of tousled brown hair and black-rimmed glasses.
Mark-Paul Gosselaar first took on the role of Zack in 1989 and went on to play the character for several years, returning for a special spin-off series in 2021.
People may be surprised by Mark-Paul's new appearance after he was spotted among the guests at the retro-themed 90s Con festival on Saturday.
The actor showed off his handsome looks as he posed for photographers wearing a casual cream button down top and a pair of grey trousers.
He also opted for a pair of black-rimmed glasses, smart brown shoes and a stylish wristwatch.
90s Con was held at the Connecticut Convention Centre in America and saw a whole host of iconic stars come together to celebrate their work.
Other guests included Melisa Joan Hart from Sabrina the Teenage Witch and Clueless movie actress Alicia Silverstone.
Saved By The Bell ran for 86 episodes and became a huge hit around the world.
Alongside Mark-Paul, Mario Lopez starred as AC Slater and Dustin Diamond played Screech Powers. The trio also had their own love interests - Kelly Kapowski (Tiffani Thiessen), Jessie Spano (Elizabeth Berkley) and Lisa Turtle (Lark Voorhies).
In 1996, Mark-Paul married actress Lisa Ann Russell, who had appeared in an episode of the spin-off Saved By The Bell: The College years three years earlier.
The pair had two children together - Michael, 19, and Ava, 17 - before splitting in 2010.
He went on to marry advertising executive Catriona McGinn and the couple share two children together - Dekker, 10, and Lachlyn, eight.
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