Zach Galifianakis is slamming celeb-obsessed culture as a “mental illness,” saying it’s the reason the country “ended up” with former President TrumpDonald TrumpFormer New York Assembly Speaker Sheldon Silver dead at 77 Biden, Democrats losing ground with independent and suburban voters: poll Bipartisan Senate group discusses changes to election law MORE.

“Celebrity in general should be mocked,” the “Hangover” star said on Conan O’Brien’s podcast “Conan O’Brien Needs a Friend,” released this week.

“It’s all ridiculous,” Galifianakis said. “It’s how we ended up with a celebrity president,” he continued. Trump famously hosted “Celebrity Apprentice” before his 2016 White House bid.

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“America’s obsession with celebrity is a mental illness,” Galifianakis said.

The performer’s remarks stemmed from a discussion about his famed sit-down with then-President ObamaBarack Hussein ObamaA needed warning for Yemen's rebels — and for our allies and enemies alike What Joe Biden can learn from Harry Truman's failed steel seizure Biden: A good coach knows when to change up the team MORE in 2014 on the Funny or Die satirical interview show “Between Two Ferns.”

“I just thought it was so funny all these celebrity actor people always get interviewed politely, and I just thought there was something funny about not being polite,” Galifianakis, 52, said.

“It was kind of a fantasy thing, man, if I could just get an interview show where I can roll my eyes at what they’re saying.”

Galifianakis admitted to being “incredibly nervous” ahead of the taping with Obama at the White House. He also recalled suffering from a seating snafu right before his chat with the 44th president.

“I was waiting in one of these rooms, a map room. I was sitting in a chair that I didn't know was roped off,” he told O’Brien.

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“So this security guy came up to me he goes, ‘What are you doing? Don’t you see that chair is roped off [that] you’re sitting in? And I said, ‘I’m so sorry.’ And I moved.”

It wasn’t long before the security guard entered again: “He came back in and he goes, ‘You can’t sit in that chair, either.’”

“I was really kind of nervous about it,” Galifianakis said.