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

Robin Williams
Age: 60
Occupation: Actor and Comedian
Known For: A long career, including the TV series 'Mork and Mindy,' winning an Oscar for 'Good Will Hunting,' and voicing the Genie in the film 'Aladdin'

Jon Lovitz
Age: 54
Occupation: Actor and Comedian
Known For: Five seasons on 'Saturday Night Live,' numerous movie and TV roles, and voiceover work on the animated show 'The Critic'

Janet Reno
Age: 73
Occupation: Lawyer
Known For: Eight years as the first female attorney general of the US, nominated by President Bill Clinton in 1993

Cat Stevens
Age: 63
Occupation: Singer, Songwriter, and Activist
Known For: Hits such as 'Wild World,' 'Peace Train,' 'Morning Has Broken,' and 'Oh Very Young,' and later changing his name to Yusuf Islam after converting to Islam

Garry Trudeau
Age: 63
Occupation: Cartoonist
Known For: Drawing the popular 'Doonesbury' strip, being the first cartoonist to win a Pulitzer, and his marriage to TV journalist Jane Pauley