Hayden Panettiere, Brody Jenner and Usain Bolt are among the many celebrities turning another year older and wiser today. Happy birthday, all!
After a number of roles as a child star, Hayden leaped onto the small screen (and into fanboys' hearts) as the amazing Claire Bennett in Heroes.
Now 23, she returns to TV this fall in ABC's Nashville.
Brody Jenner, 29, is best know for getting caught up in the web of drama that was the hit MTV show The Hills for a good couple of seasons there.
He's kept a lower profile of late than his many famous siblings (Kylie and Kendall Jenner) and step-siblings (Kourtney, Khloe and Kim Kardashian).
Still, we see a star-studded night out in Hollywood in his future.
Jamaican track star and fastest man ever Bolt, 26, just won three more Olympic gold medals in London to bring his career total to an amazing six.
Interestingly, Brody's father Bruce Jenner called out Bolt this month after the sprinter claimed he's the best athlete to live. In any case, he's pretty close.
Also celebrating a birthday today: Sex and the City's Kim Cattrall (56), Google co-founder Sergey Brin (39) and country star Kenny Rogers (74).