The movie trailer for Ang Lee’s Taking Woodstock premiered tonight on Important Things with Demetri Martin. Based on Elliot Tiber’s memior, Taking Woodstock: A True Story of a Riot, a Concert, and a Life, the comedy tells the story of Mr. Tiber, who played an unexpected but pivotal role in making the 1969 Woodstock Music and Arts Festival into the famed happening it was. Watch the trailer after the jump, and leave your thoughts in the comments below.

“Working as an interior designer in Greenwich Village during culturally and politically exciting times, Mr. Tiber felt empowered by the gay-rights movement. But he was also still staked to the family business – a Catskills motel. As its part-time manager, he had become the local town’s issuer of event permits, granting himself one annually for a small music festival. When he heard that the planned Woodstock concert had had its own permit denied by a neighboring town, he called to offer his own. Soon half a million people were on their way to Mr. Tiber’s neighbor’s farm in White Lake, New York, and Mr. Tiber found himself swept up in a generation-defining experience that would change his life, and American culture, forever.”

The film stars Demetri Martin, Emile Hirsch, Jeffrey Dean Morgan, Liev Schreiber, Paul Dano, Eugene Levy, and Dan Fogler. The film is set to hit theaters on August 14th 2009. Thanks to /Film reader Ian W for the heads up.