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

Robin Williams
Age: 61
Occupation: Actor and Comedian
Known For: Starring on the sitcom ‘Mork and Mindy,’ his Oscar-winning role in ‘Good Will Hunting,’ nominations for other movies like ‘Good Morning, Vietnam’ and ‘Dead Poets Society,’ and his voiceover work in ‘Aladdin’ and the ‘Happy Feet’ franchise

Josh Hartnett
Age: 34
Occupation: Actor
Known For: Playing Michael Fitzgerald on the television series ‘Cracker,’ starring in movies such as ‘The Virgin Suicides,’ ‘Pearl Harbor,’ ‘Black Hawk Down’ and ’40 Days and 40 Nights,’ and being the first male celebrity to represent Giorgio Armani Beauty

Justin Bartha
Age: 34
Occupation: Actor
Known For: His role as Doug in the "Hangover" movies, and being Nicolas Cage's sidekick, in the "National Treasure" films

Vanessa Lengies
Age: 27
Occupation: Actress
Known For: Her recurring role as Sugar Motta on "Glee"