Elon Musk tweets about birth rates, after news he fathered twins with top Neuralink executive

It Musk be true.

Tesla CEO Elon Musk appeared to confirm reports that he fathered twins last year with longtime Neuralink executive Shivon Zilis with a Thursday tweet that he is doing his “best to help the underpopulation crisis.”

“A collapsing birth rate is the biggest danger civilization faces by far,” he wrote Thursday morning. “Mark my words, they are sadly true.”

The billionaire added: “I hope you have big families and congrats to those who already do!”

Musk and 46-year-old Zilis filed a petition back in April to change the twins’ names so they “have their father’s last name and contain their mother’s last name as part of their middle name,” according to court documents obtained by Insider. The order was approved by a Texas judge in May, though the children’s names are not yet known.

The twins were born shortly before the birth of Musk’s second child with musician Grimes, who welcomed a baby girl named Exa Dark Sideræl with Musk via surrogate in December. They also share 2-year-old son X Æ A-Xii.

Elon Musk (Dimitrios Kambouris/)

The Tesla CEO and SpaceX founder has fathered 10 children.

In 2002, Musk also welcomed son Nevada Alexander with his then-wife and Canadian author, Justine Wilson. Just 10 weeks later, the infant tragically died from SIDS or Sudden Infant Death Syndrome. The couple went on to have a set of twins and then triplets — Griffin, Vivian Jenna, Kai, Saxon and Damian.

Earlier this year, one of the twins petitioned to legally change their gender and name to Vivian Jenna Wilson. She wrote in court papers that she “no longer live[s] with or wish[es] to be related to my biological father in any way, shape or form.”

According to her LinkedIn page, Zilis, a Yale graduate, joined Musk’s company, Neuralink, in 2017.

Musk, the richest person in the world, has most recently been romantically linked to Australian actress Natasha Bassett.