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, starring in the 'Ocean's' trilogy and the 'Bourne' series of movies, and his charitable work with organizations such as the ONE Campaign, H2O Africa Foundation, and

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'

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 recurring role as Ainsley Hayes on 'The West Wing'

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