Amy Poehler
The star of "Parks and Recreation" and "Saturday Night Live" alumni Amy Poehler got her start with the Upright Citizens Brigade, who hosted the Stony Awards and the Cannabis Cup in 2000.
Michael Phelps
He may be the reluctant stoner, but Olympic swimming legend Michael Phelps has the support of marijuana users everywhere. Phelps' pot-smoking was outed when his bong-hit seen round the world in 2009.
Brad Pitt
Brad Pitt has had a long history with marijuana. He recently called the War on Drugs "nonensical," "flawed," "backwards" and a "charade."
Redman
Redman was one of the first rappers to jump on the weed bandwagon with "How to Roll a Blunt" in 1993. He's appeared on the cover of High Times and co-starred with Method Man in "How High."
Joe Rogan
Stand-up comic Joe Rogan became an overnight sensation as the host of "Fear Factor" in 2001. About marijuana, he says, "I truly believe that marijuana legalization would completely change the direction of our society."
Seth Rogen
Before he became a famous actor, Seth Rogen was busted for smoking a joint on the beach in Malibu. "That just seemed so fucking ridiculous to me," he recalls.
Snoop Dogg
Like Willie Nelson, Snoop Dogg has defined himself as mega-weed smoker who's never seen without a joint or blunt. He's been arrested six times on marijuana charges and is now worth $150 million.
Sarah Silverman
Known for her raunchy, politically incorrect sense of humor, Sarah Silverman had her own show on Comedy Central and appeared in supporting roles in many movies, including "School of Rock" and "A Million Ways to Die in the West."