Joaquin Phoenix

Remember when actor Joaquin Phoenix went a little haywire, quit acting, grew facial hair, mumbled on "David Letterman" and announced he was going to be a rapper?

Here's the trailer for "I'm Still Here," the documentary showing Phoenix's transition -- and transformation -- directed by his good friend, actor Casey Affleck.

Joaquin Phoenix has resurfaced following some tumultuous club appearances and his controversial 2009 interview with David Letterman.

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Ben Affleck brings the thrills as a congressman whose mistress is murdered in "State of Play," but off-screen, the father of two is happily adjusting to life with his three ladies! Plus, Ben reveals the truth behind brother Casey's documentary on Joaquin Phoenix.

Joaquin Phoenix's transition from Oscar nominee to hip hop star has been rocky -- and a Miami Beach performance was no exception!

The "Walk the Line" star -- looking disheveled in a dark suit, scraggly hair and beard -- waited four hours before taking the stage at the Fontainebleau Miami Beach hotel nightclub, and when Joaquin grabbed the mic at 4 AM, he began rapping to a beat -- only to be heckled by an audience member!

Phoenix declared, "We have a (double-expletive) in the audience," adding, "I've got $1 million in the bank -- what have you got, b****?" He then jumped off the stage and into the crowd to confront the man who taunted him! It is unclear if the men exchanged blows. Joaquin was dragged back to the stage and escorted away by the club's security guards.

It seems some audience members don't buy Phoenix's career shift as legitimate -- Joaquin's brother-in-law, Casey Affleck, has been filming a documentary about Phoenix's transition to rapper, leading the public to believe the whole move is a giant farce. Casey was at the club, camera in hand, while Joaquin performed and exchanged words with the audience member.

"Extra" Friends are still cracking up over Ben Stiller's impression of Joaquin Phoenix, saying it was one of the highlights of the Oscars. Tell "Extra" -- what was your favorite moment?

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