Grimes and Elon Musk secretly welcomed a new baby girl, Y, via surrogate in December.

AVanity Fairprofile of the musician published Thursday broke the news.

The full name of the child,the pair’s second, is Exa Dark Siderl Musk.

Later on Thursday, however, Grimes tweeted that she and Musk have split since the article was written.

“Sique - peace out.”

Sique - peace out

The couple appeared to break up in 2021.

Musktold Timemagazine that he and Grimes were “probably semi-separated.”

Grimes also provided a breakdown of her daughter’s full name, Exa Dark Siderl Musk.

She also said Dark is “the unknown.

People fear it but truly it’s the absence of photons.

Dark matter is the beautiful mystery of our universe.”

It’s also reportedly a nod to the musician’s favorite Lord of the Rings character, Galadriel.

Grimes and Musk had their first child, X, in May 2020.

His full name isX A-12, and Grimes pronounces it as “X A.I.

Archangel,” according to Vanity Fair.

In the interview, Grimes said that she and Musk planned to have more children.

Representatives for Grimes didn’t immediately respond to a request for comment.