Over the past 2 years, Joaquin Phoenix seemed as though he had gone from an actor on top of the world, to a man who belonged in a mental hospital. He appeared on the Letterman show, and there were people claiming that he had gone insane. Other people believed that the whole thing was an act, being put on by Phoenix as part of a documentary.

The truth has come out. Joaquin Phoenix has in fact been working on a documentary directed by Casey Affleck, called “I’m Still Here”. The movie will be in select theaters starting on September 10th, 2010. Here is the official “I’m Still Here” Trailer.

We have discovered the official website of the documentary at http://imstillheremovie.com/. A lot of features on the site are not available yet, since the site has not officially been released. However there is a quick synopsis of the film.

The directorial debut of Oscar-nominated actor Casey Affleck, I’M STILL HERE is a striking portrayal of a tumultuous year in the life of internationally acclaimed actor Joaquin Phoenix. With remarkable access, I’M STILL HERE follows the Oscar-nominee as he announces his retirement from a successful film career in the fall of 2008 and sets off to reinvent himself as a hip hop musician. 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.

– imstillheremovie.com