PEOPLE Magazine 40th Anniversary

Look Who's Turning 40

From Leonardo DiCaprio and Victoria Beckham to Hello Kitty and Happy Days, see who's celebrating the milestone with PEOPLE

MARK-PAUL GOSSELAAR

Zack Morris is 40? We guess Gosselaar, born March 1, couldn't pull off any time outs in real life. Still busy, the former Saved by the Bell heartthrob currently stars on the TNT legal comedy Franklin & Bash and has graduated from mischievous high schooler to real-life proud papa of three kids.