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

Matt Damon
Age: 43
Occupation: Actor, Screenwriter, and Activist
Known For: Winning an Oscar for co-writing 'Good Will Hunting' along with close friend Ben Affleck, as well as starring in the 'Ocean's' trilogy and the 'Bourne' series of movies

Bruno Mars
Age: 27
Occupation: Singer, Songwriter
Known For: Co-writing the hit songs "Nothin' on You" by B.o.B, "Billionaire" by Travie McCoy, and "Right Round" by Flo Rida. Singing and writing the worldwide number-one singles "Just the Way You Are" and "Grenade" as well as "The Lazy Song" and "It Will Rain"

Nick Cannon
Age: 32
Occupation: Actor, Television host
Known For: Being Mr. Mariah Carey, hosting 'America's Got Talent,' and starring in the Nickleodeon show 'All That' and the movie 'Drumline'

Sigourney Weaver
Age: 63
Occupation: Actress
Known For: Starring in the 'Alien' franchise and in other films such as 'Ghostbusters,' 'Gorillas in the Mist,' and 'Working Girl,' and receiving three Academy Award nominations

Emily Procter
Age: 44
Occupation: Actress
Known For: Her leading role as Calleigh Duquesne on 'CSI: Miami' and her former role as Ainsley Hayes on 'The West Wing'

Angus T. Jones
Age: 19
Occupation: Actor
Known For: The half man, Jake Harper, on 'Two and a Half Men,' which has made him the highest-paid child star on television

Chevy Chase
Age: 69
Occupation: Comedian, Writer, and Actor
Known For: Being a member of the legendary original cast of 'Saturday Night Live,' playing Clark Griswold in the 'National Lampoon's Vacation' film series and starring in other movies such as 'Caddyshack,' and his current role on the NBC sitcom 'Community'