Celebrity Birthday List for Thursday October 20 Includes Snoop Dogg and ‘Jim’ on ‘The Office’

CELEBRITY BIRTHDAYS (10/20/11): John Krasinski 32 - Jim on "The Office". Next up for John is a cameo in "The Muppets" next month, and a co-starring role opposite Drew Barrymore in "Big Miracle!" this coming February ...

Watch: "Big Miracle!" trailer ...

--Snoop Dogg 40 - The Doggfather is the big 4-0???!!! Fo' schizzel ma nizzle!!!  I bet those birthday candles won't be the only ones smokin'!!! I remember when he was just a lower case g rollin' down tha street smokin' Endo sippin on gin and juice. Since then he's sold more than 25-million records worldwide, created his own language, avoided a murder conviction, and has appeared in several films, including 2001's "Training Day" and 2004's "Starsky and Hutch" ...

True Dat Fact: Snoop's real name is Calvin Broadus, Jr. He got Snoop Dogg from his mother who jokingly remarked that he looked like the Peanuts character Snoopy.

--Viggo Mortensen 53 - The studly Aragorn in "The Lord of the Rings" trilogy ...

--Sam Witwer 34 - Darth Vader's secret apprentice in "The Force Unleashed" video games, Doomsday on "Smallville", and Crashdown on "Battlestar Galactica". These days he's the vampire roommate on Syfy's "Being Human" ...

--Tom Petty 61 - Singer, songwriter, Heartbreaker. Petty and the Heartbreakers were inducted into the Rock and Roll Hall of Fame in 2002 ...

Watch: "Mary Jane's Last Dance" featuring Kim Basinger ...