Remember when Joaquin Phoenix grew a filthy beard, stopped going to the barber, and decided to quit acting to become a rapper and act like a total idiot (much to our amusement) on Letterman?  Well all of that insanity will culminate in the upcoming (mock?)-umentary film titled I’m Still Here.  Magnolia Pictures recently outed the official poster for the Casey Affleck-directed movie (see above) and it’s been confirmed that it will release wide on September 10.  The press release describes the movie as “sometimes funny, sometimes shocking and always riveting, the film is a portrait of an artist at a crossroads.  Defying expectations, it deftly explores notions of courage and creative reinvention, as well as the ramifications of a life spent in the public eye.”  Are you willing to pay money to find out what exactly happened to Phoenix during his tumultuous days as an actor-turned-hip-hop artist?  Was he for real or was it all just a hoax for a social experiment?

Update: Theatrical trailer posted after the break.

[Via Moviefone; EW-HollywoodInsider]