The trailer for Joaquin Phoenix's hip-hop documentary has been shown for the first time.

I'm Still Here follows the Hollywood actor as he attempted to launch a career as a rapper.

Phoenix was followed by cameras over a twelve month period for the fly-on-the-wall documentary.

The movie is expected to feature scenes from the actor-turned-rapper's bizarre gigs and television interviews.

Phoenix also on serveral occasions denied reports that his attempted rap career was not a hoax.

Directed by Casey Affleck, I'm Still Here is due to arrive on September 10 in the US.

(by Jason Gregory)