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.

Joker star Joaquin Phoenix recently returned to The Late Show after a whopping 15 years — but something else also happened: ...

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

A sheriff, a mayor and a virus walk into a bar in Ari Aster’s bleak and brain-sick satire that stars a dueling Joaquin Phoenix, Pedro Pascal and Emma Stone.

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 appeared on David Letterman's show in character when he was filming a mockumentary titled I'm Still Here with Casey Affleck.

Joaquin Phoenix looked and acted unrecognizable on The Late Show with David Letterman. Wearing dark shades covering his eyes and sporting a straggly beard, the Gladiator actor appeared very ...

Ari Aster’s movies, from “Hereditary” to “Midsommar,” traffic in trauma. And “Eddington” is dense with multiple levels that stoke the ever-present unease.

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 marked his first appearance on the late-night staple in 16 years. The actor stepped in as a guest of honor on ...