Here's a look at some notable birthdays being celebrated today:

 

Kaley Cuoco
Age: 27
Occupation: Actress
Known For: Playing blonde beauty Penny on 'The Big Bang Theory,' and roles on other shows such as '8 Simple Rules' and in films like 'Lucky 13'

Billy Idol
Age: 57
Occupation: Singer and Songwriter
Known For: Being an MTV star in the 1980s with hits like 'Rebel Yell,' 'White Wedding,' 'Dancing With Myself' and 'Mony Mony,' his trademark snarl and bleached-blond spiky hair, an awesome cameo in the film 'The Wedding Singer,' and continuing to successfully tour around the world

Ben Stiller
Age: 47
Occupation: Actor, Writer and Producer
Known For: Movies like 'Reality Bites,' 'There's Something About Mary,' 'Meet the Parents' and 'Zoolander,' and being the son of veteran comedian/actors Jerry Stiller and Anne Meara

Clay Aiken
Age: 34
Occupation: Singer, Songwriter and Actor
Known For: Rising to fame as the runner-up on the second season of 'American Idol,' releasing several best-selling albums, starring in 'Spamalot' on Broadway, famously coming out of the closet in 2008, and for his legions of devoted fans, who call themselves "Claymates"