Joaquin Phoenix, 50, has had some pretty iconic roles. But perhaps one of his most memorable performances was in 2009 when he went on the Late Show with David Letterman in character.

Joaquin Phoenix says he regrets his infamous interview with David Letterman, in which he remained in character for the entire ...

The actor was promoting the mockumentary 'I'm Still Here' when he delivered one of the strangest interviews ever recorded for ...

Joaquin Phoenix’s bizarre 2009 appearance on David Letterman, where he stayed in character from I’m Still Here, left many ...

Oscar winner appeared in character from ‘I’m Still Here’, leading many to believe he was having a mental breakdown ...

He appeared in character for his Casey Affleck-helmed mockumentary 'I'm Still Here', which saw Phoenix quitting acting to ...

Joaquin Phoenix told Stephen Colbert on the July 15 episode of 'The Late Show' that his infamous 2009 interview with the show's former host David Letterman was 'just one of the worst nights of my life ...

Phoenix appeared on Letterman’s show in 2009 in character for his mockumentary I’m Still Here, complete with the shaggy beard ...

“When I came on this show with Dave, I originally did the pre-interview in character and I realized that it was just a little ...

Phoenix recalled the 2009 interview during an appearance on Late Show With Stephen Colbert, explaining why he decided to ...

Joaquin Phoenix says he regrets his infamous interview with David Letterman, in which he remained in character for the entire, awkward conversation.

Now, Phoenix is setting the record straight in a new late-night appearance on The Late Show with Stephen Colbert. During his Tuesday night interview, Phoenix expressed remorse for the incident, which ...