Fyre Festival founder and promoter Billy McFarland is breaking his silence in his first TV interview since being sentenced to six years in prison for his role in the music festival scandal. 

In a new "20/20" episode, ABC News speaks directly with McFarland, who admits that lied to investors and ticket buyers. 

"I knowingly lied to them to raise money for the festival, yes," McFarland says.

McFarland also claims that his biggest problem with trying to organize the festival was an unrealistic timeline and if he had another couple of years, it would have been in "a better place." 

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"There's no way I can describe it other than, like, what the f**k was I thinking? And I think that applies to so many people on just so many decisions that I made," he admits. 

In October 2018. McFarland admitted to defrauding investors of $26 million in the 2017 Fyre Festival and over $100,000 in a fraudulent ticket-selling scheme after his arrest in the scam.

McFarland fraudulently operated a business from 2013 to 2017 that staged private events, exaggerating its potential and accomplishments to 20 investors, said Assistant U.S. Attorney Kristy Jean Greenberg.

He used false claims about that company as part of a sales pitch to entice 80 investors to pour $24 million into the Fyre Festival, she said. A separate investment of $2 million came from another entity.

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The prosecutor said he then diverted $13 million to his private financial accounts to fuel an "extravagant lifestyle" that included moving from an $8,000-a-month Manhattan apartment into a $21,000-a-month penthouse. She said he rode luxury vehicles, took frequent trips and flew in private planes.

The festival, promoted as an ultra-luxurious event and "the cultural experience of the decade," was supposed to take place over two spring 2017 weekends on the Bahamian island of Exuma.

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Customers who paid $1,200 to over $100,000 hoping to see Blink-182 and the hip-hop act Migos arrived to learn musical acts were canceled. Their luxury accommodations and gourmet food consisted of leaky white tents and packaged food.

Billy McFarland, the promoter of the failed Fyre Festival in the Bahamas, leaves federal court after pleading guilty to wire fraud charges, Tuesday, March 6, 2018, in New York. He faces a sentence of 8 to 10 years. (AP Photo/Mark Lennihan)

Billy McFarland, the promoter of the failed Fyre Festival in the Bahamas, leaves federal court after pleading guilty to wire fraud charges.  (Copyright 2018 The Associated Press. All rights reserved.)

Customers lashed out on social media with the hashtag #fyrefraud. The bust was an embarrassment to some famous people after it was promoted on social media by models and celebrities including Kendall Jenner, Bella Hadid and Emily Ratajkowski.

In November 2018, McFarland apologized for his role in the scam. 

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"I am incredibly sorry for my collective actions and will right the wrongs I have delivered to my family, friends, partners, associates and, you, the general public," he told People magazine at the time. "I've always sought — and dreamed — to accomplish incredible things by pushing the envelope to deliver for a common good, but I made many wrong and immature decisions along the way and I caused agony. As a result, I've lived every day in prison with pain, and I will continue to do so until I am able to make up for some of this harm through work and actions that society finds respectable."

The Associated Press contributed to this report.