On Sunday, billionaire Jeff Bezos reports he’s about to lose $600 million on a star-studded Aspen wedding to his fiancee, Lauren Sanchez.

The nuptial news came from an exclusive Daily Mail The report cited three unnamed sources who say the Amazon founder’s lavish wedding has been set for December 28. The report stated that actor Kevin Costner’s Dunbar Ranch and Matsuhisa sushi restaurant would be the locations for the ceremony and reception.

Numerous other sites picked up the story, citing the Daily Mail. One such report caught the attention of Bezos’ billionaire Bill Ackman, who posted on X that the dollar figure was “not credible.”

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“Unless you’re buying each of your guests a house, you can’t spend that much money,” Ackman posted.

Jeff Bezos and Lauren Sanchez attend the Met Gala celebrating “Sleeping Belles: Reawakening Fashion” at the Metropolitan Museum of Art on May 6, 2024 in New York City. (Cindy Ord/MG24/Getty Images for the Met Museum/Vogue/Getty Images)

Bezos, who is worth an estimated $238.5 billion, responded to Ackman’s tweet, not only discussing the price tag, but appearing to imply that there is no wedding in the works next weekend.

“Also, this is all completely false; none of this is happening,” Bezos posted on X. “The old adage ‘don’t believe everything you read’ is even truer today than ever.”

Bezos continued, paraphrasing a quote often attributed to Mark Twain.

“Now the lies can reach the whole world before the truth can get its pants on. So be careful people and don’t be gullible,” he wrote.

Bezos said that “it will be interesting to see if all the outlets that ‘covered’ and re-reported on this issue there is a correction when it comes and goes and doesn’t happen.”

Harrison Ford, Calista Flockhart, Lauren Sanchez and Jeff Bezos attend the Conservation International Gala in New York City on April 25, 2024. (Yvonne Tnt/BFA.com/Shutterstock)

Bezos, 60, and Sánchez, 55, have been engaged since May 2023. Before their engagement, their relationship it had lasted almost five years. Both had previous marriages, and Bezos had separated from Mackenzie Scott after two decades.

Bezos’ net worth makes him the second richest man in the world after Elon Musk, according to Forbes.

He is currently the owner The Washington Post and aerospace company Blue Origin.

Jeff Bezos and Lauren Sanchez arrive at the Art Basel exhibit in Miami Beach, accompanied by Lauren’s son Nikko Gonzales on December 7, 2023. (Mega/Background Grid/Background Grid)

“This is an important reminder to you, as the owner of one of the nation’s major newspapers, why it is so important that you take every step necessary to make sure your reporters get the facts,” Ackman said in answer to Bezos quashing wedding rumors.

Sánchez is one New York Times bestselling author, Emmy Award-winning journalist and vice president of the Bezos Earth Fund, according to her Instagram bio.

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Blue Origin did not immediately respond to an inquiry from FOX Business about whether Bezos and Sanchez will marry the weekend after Christmas.

Aislinn Murphy of FOX Business contributed to this report.