Theranos founder Elizabeth Holmes is reportedly engaged to a 27-year-old hotel heir. Here's what we know about their relationship

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Theranos founder Elizabeth Holmes is living with her fiancé in a luxury apartment in San Francisco.

• Theranos founder Elizabeth Holmes is engaged, Vanity Fair reported.
• Holmes' fiancé, William "Billy" Evans, is the 27-year-old heir to the Evans Hotel Group, according to the Daily Mail.
• The couple reportedly lives in a luxury apartment in San Francisco while Holmes awaits trial.
• Holmes, 35, was once the world's youngest female self-made billionaire and running a $9 billion company before it all came crashing down and she was charged with "massive fraud."

Theranos founder Elizabeth Holmes is engaged, Vanity Fair's Nick Bilton reported.

Her fiancé is William "Billy" Evans, a 27-year-old hotel heir, according to the Daily Mail. Evans has also worked for driverless car start-up Luminar Technologies.

"She wears his M.I.T. signet ring on a necklace and the couple regularly post stories on Instagram professing their love for each other," Bilton wrote in a February Vanity Fair article. "She reliably looks 'chirpy' and 'chipper.'"

Holmes and Evans have reportedly been living in a luxury apartment building in San Francisco while Holmes awaits trial. Holmes, 35, was once a Silicon Valley superstar and the world's youngest self-made billionaire after founding blood-testing startup Theranos. But when the flaws and inaccuracies of the company's technology were revealed, Theranos and Holmes were charged with massive fraud.

Read more: The rise and fall of Elizabeth Holmes, who started Theranos when she was 19 and became the world's youngest female billionaire before it all came crashing down

Holmes and her fiancé, Evans, reportedly share a Siberian husky named Balto, according to Brides magazine.

The pair has not publicly confirmed their relationship, but they were reportedly seen partying at Burning Man in 2018, according to the Mail.

Justin Sullivan/Getty Images

Holmes arrives at court in California in January 2019.

In 2014, Holmes told The New Yorker that she "doesn't date."

But in 2019, it came out that the Theranos founder was previously in a relationship with the former president of Theranos, Sunny Balwani, as Business Insider's Lydia Ramsey previously reported. The two kept their relationship a secret at the time, but both later confirmed it in deposition tapes reported by ABC News in January 2019. Holmes said in the tapes that the two were together "for a long period of time" but that they didn't disclose their relationship to investors.

REUTERS/Mike Blake

Holmes was previously in a relationship with the then-president of Theranos.

Their relationship was of interest to John Carreyrou, investigative reporter for The Wall Street Journal and author of "Bad Blood" John Carreyrou.

Read more: The mysterious story of former Theranos president Sunny Balwani, who was in a relationship with Elizabeth Holmes and now faces criminal charges

"It instantly became clear to me that she was lying to her board about this romantic relationship that she was having with the number two of the company, who by the way, was also about 20 years older," Carreyrou previously told Business Insider.

Business Insider reached out to Evans for confirmation but did not immediately hear back.