Here's a Clip of the Bob Dylan movie I'm Not There with Cate Blanchett as Bob Dylan and David Cross as Allen Ginsberg. The movie goes through Dylan's life with different actors playing in different stages. Among those playing him are Christian Bale, Marcus Carl Franklin (Lackawanna Blues), Richard Gere, Heath Ledger, Ben Whishaw (Perfume), and, of course, Cate Blanchett. The film is scheduled for release in the US on September 21.
In case the video doesn't work: http://www.youtube.com/watch?v=VyWgzUGOliw