Hollywood actors love to make excuses for their bad behavior.
They blame everyone except themselves when things go wrong.
But Joaquin Phoenix left Stephen Colbert stunned when he made this humiliating confession about David Letterman.
Phoenix finally admits the truth about his train wreck interview
Joaquin Phoenix appeared on The Late Show with Stephen Colbert on Tuesday night for the first time in 15 years since his catastrophic 2009 interview with David Letterman became one of the most uncomfortable moments in late-night television history.
The Oscar winner didn’t try to spin his way out of responsibility or blame others for what happened.
Instead, Phoenix delivered a brutal assessment of his own behavior that caught Colbert completely off guard.
"It was horrible," Phoenix told Colbert about the infamous February 2009 appearance. "It was so uncomfortable. I regret it. I’ll never do it again. I’m so sorry."
The 50-year-old actor described the experience as "one of the worst nights of my life" during his candid conversation with Colbert.
This wasn’t some carefully crafted public relations apology designed to rehabilitate his image.
Phoenix’s remorse appeared genuine as he reflected on a moment that has haunted him for more than 15 years.
The Joker star was promoting Casey Affleck’s mockumentary I’m Still Here when he showed up to Letterman’s show sporting shaggy hair, an untamed beard, and sunglasses while staying completely in character.
Phoenix played a fictionalized version of himself who had quit acting to pursue a hip-hop career in the film.
The problem was that nobody knew it was an act at the time.
The interview that fooled America
During the 2009 interview, Phoenix gave one-word answers, chewed gum throughout the segment, and appeared completely disinterested in promoting his work.
Letterman grew visibly frustrated with his unresponsive guest as the interview spiraled into an awkward disaster.
The veteran late-night host quipped at one point, "I’ll come to your house and chew gum," and ended the segment by telling Phoenix, "I’m sorry you couldn’t be here tonight."
Viewers and media outlets speculated that Phoenix was having a mental breakdown.
The bizarre behavior led many to believe the acclaimed actor was suffering from serious personal problems.
Phoenix explained to Colbert that he initially did the pre-interview in character but then called the show’s producers back to warn them about what he planned to do.
"I called them back and I said, ‘Listen, this is what I’m doing. I’m coming out here and I’m doing this whole thing. And I just want Dave to like, lacerate me. I just want it to be really dangerous,’" Phoenix recalled.
The actor said his intention was to provoke a strong reaction from Letterman and see how he would respond under pressure.
"That was the kind of intention — I just always wanted to get this reaction and see how I would respond to that," Phoenix explained. "So it was beneficial for no one to know, except when needed."
But the experiment backfired spectacularly and left Phoenix with lasting regrets about the stunt.
Letterman knew what was happening all along
The most surprising revelation came years later when David Letterman appeared on The Howard Stern Show in 2017 and admitted he was aware of Phoenix’s performance ahead of time.
"I knew what he was doing ahead of time," Letterman told Stern. "I did enjoy it because it was, you know, like getting your work in on the heavy bag. It was just easy. It was batting practice."
This means Letterman was essentially playing along with Phoenix’s elaborate hoax while making the actor look foolish in the process.
The veteran host was able to come out looking like the professional while Phoenix appeared unhinged to millions of viewers.
Phoenix returned to The Late Show in 2010 to apologize to Letterman for the first time.
"I hope I didn’t offend you in any way," he said during that follow-up appearance. "You’ve interviewed many, many people and I assumed that you would know the difference between a character and a real person, but I apologize."
But Phoenix’s latest comments to Colbert suggest his regret has only deepened over time.
A rare moment of Hollywood honesty
When Colbert jokingly wondered if Letterman might be watching the Tuesday night show, Phoenix seized the opportunity to apologize directly to the retired host.
"He might be and I just need to say, I’m sorry," Phoenix responded without hesitation.
Colbert, who witnessed the original interview live, told Phoenix it was "great TV" but acknowledged that such moments come at a cost.
"Those of us who do these kind of shows know that there’s something you never want to be part of," Colbert explained. "And the phrase is ‘great TV.’ And my friend, that was great TV."
Phoenix’s willingness to take full responsibility for the debacle stands out in an industry where celebrities rarely admit fault.
Most Hollywood figures would blame their publicists, the network, or claim they were misunderstood.
Instead, Phoenix owned up to his mistake and expressed genuine remorse for putting Letterman in an uncomfortable position.
The actor reflected on the contradictory nature of the experience during his conversation with Colbert.
"It was strange because in some ways, it was a success, and it was also just one of the worst nights of my life," Phoenix said.
The 2009 interview generated massive attention and became a viral sensation before viral content was commonplace.
But Phoenix clearly believes the personal cost wasn’t worth whatever publicity the stunt generated for his mockumentary.
I’m Still Here was a commercial and critical flop despite all the attention surrounding Phoenix’s behavior during its promotion.
Phoenix is currently starring in Ari Aster’s new film Eddington and appears to be focused on serious dramatic work rather than elaborate publicity stunts.
His honest reflection on the Letterman incident suggests he’s learned valuable lessons about the difference between generating buzz and respecting his colleagues in the entertainment industry.
In a town full of fake apologies and calculated image rehabilitation, Phoenix’s genuine regret about his past behavior was a refreshing display of accountability.
¹ Variety Staff, "Joaquin Phoenix Says ‘I’m So Sorry’ for ‘Horrible’ and ‘Uncomfortable’ Letterman Interview: ‘One of the Worst Nights of My Life’," Variety, July 16, 2025.
² CNN Entertainment, "Joaquin Phoenix reflects on ‘horrible’ Letterman interview that the actor calls ‘one of the worst nights of my life’," CNN, July 16, 2025.
³ The Wrap, "Joaquin Phoenix Tells Stephen Colbert He Regrets His Infamous Letterman Interview: ‘One of the Worst Nights of My Life’," The Wrap, July 16, 2025.
⁴ SiriusXM, "David Letterman and Howard Stern together again: All the highlights," SiriusXM, August 31, 2017.
