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

Jimmy Fallon
Age: 38
Occupation: Actor, Comedian, and Talk-Show Host
Known For: Six years as a cast member of 'Saturday Night Live,' and hosting 'Late Night with Jimmy Fallon'

Adam West
Age: 84
Occupation: Actor
Known For: Playing the title character on the 1960s camp TV show, 'Batman,' and for voiceover work including Mayor Adam West, the lunatic mayor of Quahog, Rhode Island, on 'Family Guy'

Jeremy Irons
Age: 64
Occupation: Actor
Known For: Being the voice of Scar on 'The Lion King,'  and currently starring in the Showtime historical drama 'The Borgias'

Alison Sweeney
Age: 36
Occupation: Actress, Television show host
Known For: Playing Samantha "Sami" Brady Hernandez on NBC's 'Days of our Lives,' and hosting 'The Biggest Loser'

Kim Richards
Age: 48
Occupation: Reality TV Star
Known For: The blonde sister on 'Real Housewives of Beverly Hills.'  She used to be the little girl from Disney's Witch Mountain' movies in the '70s. She and RHBH sister Kyle also have another sister named Kathy. Kathy Hilton. Yup, Paris' mother

Katrina Bowden
Age: 24
Occupation: Actress
Known For: Playing Tina Fey's sexy personal assistant, Cerie Xerox, on '30 Rock,' and "Esquire" magazine's 2011 Sexiest Woman Alive

David McCallum
Age: 79
Occupation: Actor
Known For: Ducky, the medical examiner on 'NCIS'

James Lipton
Age: 86
Occupation: Writer, composer, actor and dean emeritus of the Actors Studio Drama School at Pace University in New York City
Known For: Hosting 'Inside the Actors Studio'