Elon Musk and Grimes have a third child, new biography reveals

Elon Musk and Grimes have a third child, revealed by a new biography on the billionaire.

Elon Musk and Grimes - whose full name is Claire Elise Boucher - were first romantically linked back in 2018 and went on to have two children together.

The first, born in May 2020, is named X Æ A-12 and the second - Exa Dark Sideræl - was born in December 2021.

A new biography written by Walter Isaacson - titled Elon Musk - has revealed the former couple actually share a third child together too.

Musk and Grimes kept news of their second child quiet, welcoming Exa Dark Sideræl Musk via surrogate in 2021.

And the Tesla CEO also kept the news of his twins with Neuralink executive Shivon Zilis secret too, with court documents obtained by Insider confirming their existence - the documents filed to have the pair's names changed.

Musk and Zilis' children were born just weeks before Musk and Grimes' welcomed Exa and according to the New York Times review, Musk 'didn't tell Grimes he had just had twins with one of his employees'.

And it's since been revealed another child has been kept secret - his and Grimes' third.

Getty Images/ Robyn Beck/ AFP

According to New York Times writer Jennifer Szalai's review of Isaacson's biography, the Tesla CEO has a total of '10 children with three women'.

The review states Grimes is the mother of 'three of Musk's children' and reveals the name of the third secret child: Techno Mechanicus, or Tau for short.

And it hasn't taken long for people to flock to X - formerly known as Twitter - to respond to the news of there being another secret child of Musk's.

New York Times/ X/ @ArmandDomaTwitter/

One user remained fairly confused by the news of yet another child, questioning: "I thought they only had one kid but two more????"

"Hold up when did they have a second kid," another echoed.

A third said: "Didn’t even realize they had a second. I’m obviously not a true Elon fanboy."

And a final wrote: "Congratulations to Elon Musk, that name is something else though."

X/ @PopBase

While Musk sows his seed secretively, he isn't so abashed about sharing other details of his life, such as being willing to measure the length of his penis as a way of going head-to-head with Facebook co-founder Mark Zuckerberg.

Thankfully, none of us have to know how long either magnate's d**k sizes are, as they settled on a cage fight instead, although whether it's actually going to happen, who knows.

Elon Musk is set for release on Tuesday, 12 September.