Elon Musk just welcomed his (checks notes)... 14th child.

Just weeks after Ashley St. Clair announced she'd given birth to Elon Musk's 13th child five months ago, the billionaire is a new dad again.

The 53-year-old has welcomed his 14th child with partner Shivon Zilis, who is a director at Neuralink, one of Musk's companies​​. This is their fourth child together.

Zilis announced the news via a post on X (formerly Twitter) on Saturday in honour of their daughter Arcadia's birthday.

"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. Built like a juggernaut, with a solid heart of gold. Love him so much," she wrote.

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. Built like a juggernaut, with a solid heart of gold. Love him so much ♥️

— Shivon Zilis (@shivon) February 28, 2025

Musk simply responded with a heart emoji.

The news comes a week after the tech billionaire's ex-partner Grimes used social media to plead for his help with the several children they share.

Grimes, whose real name is Claire Boucher, and Musk have three children together — four-year-old X Æ A-Xii, three-year-old Exa Dark Sideræl, and two-year-old Techno Mechanicus.

The musician addressed the billionaire on X (formerly Twitter) in a series of since-deleted tweets.

"Plz respond about our child's medical crisis," she wrote, per screenshots shared by TMZ.

"I am sorry to do this publicly but it is no longer acceptable to ignore this situation. This requires immediate attention."

She continued: "If you don't want to talk to me, can you please designate or hire someone who can so that we can move forward on solving this. This is urgent, Elon."

While the 36-year-old didn't specify which child needed help, she said that she took the matter public as Musk allegedly wouldn't return her texts, calls or emails.

"[He] has skipped every meeting and our child will suffer life-long impairment if he doesn't respond asap," Grimes wrote.

"So I need him to f--king respond and if I have to apply public pressure then I guess that's where we're at."

After some users claimed they were having difficulties viewing Grimes' posts, the mother-of-three decided to remove them from the platform.

"I am deleting them now because if they're being shadow-banned and not eliciting a response then all it is is a media circus at the expense of the kids," she wrote.

Grimes' public call-out came on the back of conservative commentator Ashley St. Clair's own post on X, alleging she gave birth to Musk's child five months ago, and calling out the Tesla CEO for avoiding contact with her.

The birth announcement, St. Clair said, was an attempt to get ahead of impending tabloid reports about the child, who until then had remained a secret to the outside world.

Watch Elon Musk's monologue on Saturday Night Live. Article continues after video.

"Five months ago, I welcomed a new baby into the world. Elon Musk is the father," St. Clair wrote, saying she had kept the news private for safety reasons.

"But in recent days it has become clear that tabloid media intends to do so, regardless of the harm it will cause," she added, requesting privacy for their child.

Alea Iacta Est pic.twitter.com/gvVaFNTGqn

— Ashley St. Clair (@stclairashley) February 15, 2025

A representative for St. Clair addressed the announcement, saying that Musk and St. Clair had been in communication about an "agreement about raising their child".

"It is disappointing that a tabloid reporter, who repeatedly ambushed Ashley and her family, made it impossible to complete that process confidentially."

A Statement Regarding @stclairashley. pic.twitter.com/RHlnJ1fDN9

— Brian Glicklich (@brianglicklich) February 15, 2025

"Whoa," Musk wrote on X, in response to a post that claimed, "Ashley St. Clair plotted for HALF A DECADE to ensnare Elon Musk."

St. Clair then called Musk out again for responding to online "smears".

"Elon, we have been trying to communicate for the past several days and you have not responded. When are you going to reply to us instead of publicly responding to smears from an individual who just posted photos of me in underwear at 15 years old?" she wrote.

If you're struggling to keep track (we don't blame you), Musk now has 12 children (excluding his first child, who sadly passed away), with five different women.

From his first six kids with his ex-wife Justine Wilson, to his complicated family situation with musician Grimes, the twins he shares with tech executive Shivon Zilis, and now a child with St. Clair — here's everything we know about the ever-expanding Musk family tree.

Nevada Alexander.

In 2002, Musk and his first wife, Justine Wilson, welcomed their son, Nevada Alexander. But at just 10 weeks old, Nevada passed away from Sudden Infant Death Syndrome (SIDS).

"Nevada went down for a nap, placed on his back as always, and stopped breathing," Wilson wrote in an essay for Marie Claire in 2010. "By the time the paramedics resuscitated him, he had been deprived of oxygen for so long that he was brain-dead."

After three days in an Orange County hospital, his parents made the difficult decision to remove life support. Wilson held Nevada in her arms as he passed away.

Vivian Jenna Wilson and Griffin.

After the loss of Nevada, Wilson and Musk turned to IVF to grow their family. Through this process, Wilson gave birth to twins Griffin and Xavier (now Vivian) in 2004.

"I buried my feelings... coping with Nevada's death by making my first visit to an IVF clinic less than two months later. Elon and I planned to get pregnant again as swiftly as possible. Within the next five years, I gave birth to twins, then triplets," she wrote in Marie Claire.

The relationship between Elon Musk and Vivian has become increasingly strained in recent years. Griffin has stayed largely private, appearing with Musk at an American Express event in Miami in May 2024.

Vivian Jenna Wilson. Image: Instagram/vivllainous

Vivian, who is now 21, came out as transgender and legally changed her name. In doing so, she also chose to drop the Musk surname. The decision came amid her father's public comments about transgender issues and what he controversially termed "the woke mind virus".

Speaking to NBC News, Vivian spoke about Musk and claimed he was absent during much of her life.

"He was there, I want to say, maybe 10% of the time. That's generous. He had half custody, and he fully was not there," she said.

Kai, Saxon and Damian.

Elon Musk and his children Griffon, Kai, Saxon and Damian. Image: Twitter/Elon Musk

In 2006, Justine Wilson welcomed triplet boys — Kai, Saxon and Damian.

Musk's children with Wilson have largely maintained their privacy, with only occasional public appearances alongside their father, including accompanying Musk to meet Pope Francis in 2022.

X Æ A-12.

In May 2020, Grimes and Elon Musk welcomed their first child together — a son with one of the most talked-about names in celebrity history.

The couple named their baby X Æ A-12, though they later modified it to X Æ A-Xii to comply with California law, which doesn't allow numbers in names.

While the baby is simply known as "X" day-to-day, there's been some confusion about the full pronunciation.

Elon Musk and son X Æ A-12. Image: Getty.

And it seems, Mum and Dad couldn't quite agree on how to say it — Grimes suggested it should be pronounced "X A.I.", while Musk told Joe Rogan it was "X Ash".

The unique name was apparently inspired by the Lockheed A-12 reconnaissance aircraft, which is… well, fitting.

Strider and Azure.

In late 2021, court documents revealed Elon Musk had welcomed twins with Shivon Zilis, an executive at his company Neuralink. The children were born in Austin, Texas, where Musk resided.

Based on Walter Isaacson's 2023 biography of Elon Musk, the twins' full names are: Strider Sekhar Sirius and Azure Astra Alice.

Exa Dark Sideræl.

In a 2022 Vanity Fair interview, Grimes revealed she and Elon Musk had quietly welcomed their second child, a daughter, via surrogate.

Their baby girl was given the name Exa Dark Sideræl, though she's known simply as 'Y'.

Exa Dark Sideræl. Image: Twitter/Grimes.

Like her brother, Exa Dark Sideræl's name also has an interesting backstory. And we didn't expect anything less.

"Exa is a reference to the supercomputing term exaFLOPS (the ability to perform 1 quintillion floating-point operations per second)," she said.

"Dark, meanwhile, is the unknown. People fear it but truly it's the absence of photons. Dark matter is the beautiful mystery of our universe,'" Grimes explained.

Techno Mechanicus.

In a surprising revelation from Walter Isaacson's 2023 biography, it turns out Grimes and Elon Musk quietly welcomed a third child together around Father's Day 2022.

Their baby boy, given the characteristically unique name Techno Mechanicus (though he goes by the much simpler nickname "Tau"), was born via surrogate.

"Tau is so amazing. He came out with eyes that could just see so deeply into your soul, with so much knowledge. He looks like a little Spock. He's definitely a Vulcan," Grimes said in the biography.

Arcadia.

In 2024, Musk and Zilis welcomed their third child, Arcadia, together, which Musk confirmed in June, calling out reports that he had "secretly fathered" another child.

"As for 'secretly fathered,' that is also false," Musk told Page Six. "All our friends and family know."

"Failure to issue a press release, which would be bizarre, does not mean 'secret.'"

Baby Number 13.

And that brings us to baby number 13, who became the subject of great attention in recent days as it was revealed Musk had fathered a child with St. Clair.

"Five months ago, I welcomed a new baby into the world. Elon Musk is the father. I have not previously disclosed this to protect our child's privacy and safety, but in recent days it has become clear that tabloid media intends to do so, regardless of the harm it will cause," she wrote.

"I intend to allow our child to grow in a normal and safe environment," St. Clair continued. "For that reason, I ask that the media honor our child's privacy, and refrain from invasive reporting."

Seldon Lycurgus.

Last but not least (for now) is son Seldon Lycurgus; Musk's fourth child with Shivon Zilis. The couple announced Seldon's arrival in March 2024.

"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. Built like a juggernaut, with a solid heart of gold. Love him so much," Zilis wrote.

Feature Image: X/@shivon

This article was originally published on February 17, 2025 and has since been updated.