In a move commenters described as having "Craig Ferguson vibes," Stephen Colbert and Joaquin Phoenix spent the last moments of their Late Show interview in awkward silence.

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

Joaquin Phoenix memorably appeared on 'The Late Show' to speak with David Letterman in 2009 while in character for a 2010 mockumentary he and Casey Affleck made

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

Joaquin Phoenix is looking back at the rollercoaster of awkwardness that etched his 2009 interview with David Letterman in late-night history.

Joaquin Phoenix deeply regrets his infamous David Letterman interview. The “Joker” actor, 50, appeared” Tuesday and looked back on the infamous exchange he had with Letterman, 78, in the same NYC studio over 15 years ago.

J oaquin Phoenix has apologized for his controversial 2009 appearance on The Late Show with David Letterman. Phoenix, in character for his role in the mockumentary I'm Not Here, answered Letterman's questions with mumbles and one-word answers, leaving the host and the audience confused.

After being welcomed to the late-night show by Letterman successor Stephen Colbert, Phoenix reflected on the awkward 2009 interview, in which he appeared on "The Late Show" sporting long hair, an unruly beard and sunglasses.

Joaquin Phoenix was the guest of honor on “The Late Show With Stephen Colbert” on Tuesday night, marking his first appearance on the late-night staple since his infamous 2009 interview with Dave Letterman and subsequent on-air apology the next year.

J oker star Joaquin Phoenix recently returned to The Late Show after a whopping 15 years — but something else also happened: he apologized for his infamous David Letterman interview from 2009 that took place on the show before Letterman turned the reins over to Stephen Colbert.