Elon Musk has welcomed a fourth child with Neuralink exec Shivon Zilis, which would make the controversial billionaire a father of 14 if author Ashley St. Clair’s recent claims are true.

Zilis, 39, announced the news Friday afternoon on Musk’s social media platform X.

“Discussed with Elon and, in light of beautiful Arcadia’s birthday, we felt it was better to also just share directly about our wonderful and incredible son Seldon Lycurgus,” Zilis wrote. “Built like a juggernaut, with a solid heart of gold. Love him so much.”

Musk tweeted a heart emoji in response to Zilis’ post, which did not reveal when their latest addition was born.

In November 2021, the pair announced that they’d welcomed twins earlier that year — son Strider and daughter Azure.

Bloomberg then reported last June that Musk and Zilis had also welcomed a third child, now known to have been born on Feb. 28, 2024.

Zilis celebrated Arcadia’s first birthday with a separate post on X earlier in the day Friday.

The latest baby news comes exactly two weeks after St. Clair announced on Valentine’s Day that she’d given birth to the Tesla honcho’s 13th child last fall.

The 26-year-old conservative influencer, who authored a seemingly anti-trans children’s book and has appeared on Fox News, tweeted that 53-year-old “Elon Musk is the father” of her infant.

She said she decided to go public about the child after learning that an unnamed tabloid was planning to break the news.