Elon Musk’s Daughter Reacts to Discovery of Billionaire’s 14th Known Child

Vivian Wilson, Elon Musk

Elon Musk’s daughter, Vivian Wilson, found out about her newest sibling via the Internet—again.

Wilson, who is one of six children with Musk’s first wife Justine Wilson, first expressed disbelief that she was learning about a new sibling online last month when MAGA influencer Ashley St. Clair, 26, revealed that she has a new baby with the SpaceX founder.

“If I had a nickel for every time that I found out I had a new half-sibling online, I’d have a few nickels- which isn’t a lot but it’s weird that it happened SIX SEPARATE TIMES,” Wilson wrote on Feb. 15 on Instagram Threads.

But it seems that updates about the growing brood still are not hitting the family chat.

The 20-year-old, who is estranged from her father, suggested she was blindsided again when it was announced Friday that her father had another child, his 14th known kid, with colleague Shivon Zilis.

Quoting her Threads post last month, she updated her tally of times that she’s learned about a sibling on the Internet, writing, “Seven💀.”

Elon Musk's Daughter Reacts to Discovery of Billionaire's 14th Known Child

Zillis, a top Neuralink executive, announced on X that she had a fourth child—Seldon Lycurgus—with Musk, following the births of twins Strider and Azure in 2021 and Arcadia, who was born in February 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,” the 38-year-old gushed.

“Built like a juggernaut, with a solid heart of gold. Love him so much ❤️ ” to which Musk replied with his own heart message.

The news comes as Musk’s custody issues with another mother of children, St. Clair, play out in the media. St. Clair, who is suing Musk for sole custody, has characterized him as an absent father who has only met their child three times and was not present for the birth last year.

And she’s not the only one that he appears to be having issues co-parenting with.

Musk also shares an additional three children with singer Grimes, who pleaded with Musk to respect their son’s privacy and stop using him for photo ops.