Elon Musk and Grimes secretly welcome a second child

Grimes and Elon Musk attend "Heavenly Bodies: Fashion & the Catholic Imagination", the 2018 Costume Institute Benefit at Metropolitan Museum of Art on May 7, 2018 in New York City. (Photo by Taylor Hill/Getty Images)

Elon Musk and Grimes secretly welcomed a second child – a baby girl.

According to a Vanity Fair profile published on Thursday, the Canadian singer invited the interviewer to her home to discuss her upcoming album "Book 1." It was during their meeting when the interviewer, a parent to two kids, heard the unmistakable sounds of a baby. That’s when the 33-year-old was asked point-blank if she had another baby in her life.

"I’m not at liberty to speak on these things," Grimes told the outlet. "Whatever is going on with family stuff, I just feel like kids need to stay out of it, and [my son] X is just out here. I mean, I think E is really seeing him as a protégé and bringing him to everything and stuff… X is out there. His situation is like that. But, yeah, I don’t know."

While Grimes hesitated at first, she finally revealed that yes, she and the Tesla and SpaceX founder welcomed a baby girl.

"She’s a little colicky too," said Grimes, who chuckled over the idea of keeping the announcement under wraps. "I don’t know. I don’t know what I was thinking."

The outlet shared that the baby’s name is Exa Dark Sideræl Musk. Her nickname is "Y."

Exa "is a reference to the supercomputing term exaFLOPS (the ability to perform 1 quintillion floating-point operations per second)." Dark represents "the unknown" that is also "a beautiful mystery of our universe." Grimes noted that Sideræl—"sigh-deer-ee-el"— is "a more elven" spelling of sidereal, "the true time of the universe, star time, deep space time, not our relative earth time." The name also pays tribute to her favorite "Lord of the Rings" character Galadriel, who "chooses to abdicate the ring."

Grimes shared that she and Musk, 50, "occasionally call her Sailor Mars," which is a nod to the "Sailor Moon" manga. The entertainer admitted she's worried that Exa Dark Sideræl Musk might be "a little boring."

"I was fighting for Odysseus Musk," she said. "A girl name Odysseus is my dream."

Grimes also opened up about her current relationship with Musk. A September 2021 report suggested the couple had split.

"There’s no real word for it," she explained. "I would probably refer to him as my boyfriend, but we’re very fluid. We live in separate houses. We’re best friends. We see each other all the time… We just have our own thing going on, and I don’t expect other people to understand it."

The star added that they’re happy and that the pair plan to have more children.

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