Joaquin Phoenix has made a bizarre appearance on The Late Show With David Letterman.
The actor, 34, was on the show to promote new film Two Lovers.
Joaquin, who has given up acting to become a rapper, concerned both the presenter and the audience with his erratic behaviour.
The Gladiator star mumbled through the interview causing the usually calm host to snap at him.
'Joaquin, I'm sorry you couldn't be here tonight,' David said at the end of the show.
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