A quartet of our favorite stars are another year wiser on this 9th day of April. We’re marking these celebrity birthdays with photo tributes to the girls (and boy):
The lovely Kristen Stewart of Twilight fame is 19 today …
… while Gossip Girl star Leighton Meester is 23 …
… adult film legend and new mom Jenna Jameson is 35 …
… and Hugh Hefner (a man who truly needs no description) is 83!