Woody Harrelson, who's an active campaigner for the legalisation of cannabis, has narrated a documentary called Grass.
Harrelson, who has been arrested on pro-hemp demonstrations before, told the San Francisco Chronicle, "I do smoke, but I don't go through all this trouble just because I want to make my drug of choice legal." The documentary covers the history of anti-marijuana laws and how, despite legislation, usage has increased. Harrelson added, "It's about personal freedom."