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

JIMMY FALLON

Here's proof that things gets better with age: Since making his name on Saturday Night Live, Fallon, born Sept. 19, has become the king of late night, thanks to his coveted gig as the host of the Tonight Show. His History of Rap and spot-on celeb impressions leave audiences laughing, but what puts a smile on Fallon's face? One-year-old daughter Winnie. As the first-time dad told PEOPLE, "My life has never been this cool."