In a revelation that took fans by surprise, Tesla CEO Elon Musk and musician Grimes have welcomed their second child together — a baby girl named Exa Dark Sideræl Musk, affectionately nicknamed “Y”.

The birth was kept under wraps until Grimes, 33, shared the news during an in-depth interview with Vanity Fair. The child was born in December via surrogate, expanding the already unique and high-profile Musk family.

Although Grimes initially referred to Musk, 50, as her “boyfriend” during the interview, she later clarified on Twitter that the couple had broken up since the conversation took place.

This update only adds to the long and sometimes puzzling timeline of the couple’s relationship, which has seen multiple breakups and reconciliations since they first began dating in 2018.

A Complicated Relationship Timeline

Elon Musk and Grimes’ relationship has long captivated the media due to its unconventional nature and high-profile status. After first being linked in 2018, the pair made headlines at the Met Gala that same year.

However, their relationship has been anything but linear. In September 2021, Musk told Page Six that he and Grimes were “semi-separated,” citing the pressures of long-distance and conflicting work schedules.

Despite that, they continued to co-parent their son, X Æ A-12 Musk — or simply “X” — who was born in May 2020. The announcement of their second child via surrogate indicates a continuing commitment to their shared vision of family, even amid the romantic instability.

A New Addition: Exa Dark Sideræl Musk

The name Exa Dark Sideræl is as unique as it is philosophical. According to Grimes, “Exa” refers to the supercomputing term exaFLOPS, while “Dark” represents the unknown — “the beautiful mystery of our universe.”

“Sideræl” (pronounced “sigh-deer-ee-el”) is a more “elven” spelling of sidereal, referring to the true time of the universe, star time, deep space time — not our relative earth time.

Though the baby’s arrival was meant to remain private, her cries during the Vanity Fair interview revealed her presence, prompting Grimes to open up about their decision to use a surrogate due to complications during her first pregnancy.

Musk’s Complex Family Tree

Elon Musk is known not only for revolutionizing industries like electric vehicles and space travel, but also for his large and somewhat complex family. With Exa’s birth, Musk now has seven living children.

His first marriage was to Canadian author Justine Wilson, with whom he had six children. Tragically, their firstborn son Nevada Alexander Musk passed away from Sudden Infant Death Syndrome (SIDS) at just 10 weeks old.

The couple then went on to have twins and triplets through IVF — making Musk a father of five more children with Wilson.

Following their divorce in 2008, Wilson publicly accused Musk of treating her more like an employee than a spouse, claiming the relationship lacked the equality and partnership she desired. Despite this, she continues to co-parent with Musk.

Marriages, Affairs, and Rumors

After parting ways with Justine, Musk entered into a turbulent relationship with British actress Talulah Riley. The couple married in 2010, divorced in 2012, remarried in 2013, and divorced again in 2016.

Their back-and-forth relationship was often covered in tabloids, further contributing to Musk’s enigmatic public persona.

Musk was also briefly linked to actress Amber Heard, around the time of her highly publicized divorce from Johnny Depp. Both Musk and Heard have denied having an affair, but the rumors persisted, especially during Depp’s court battle against Heard, where Musk was mentioned multiple times.

Where Does Elon Musk Live?

Despite being one of the richest individuals in the world with an estimated net worth of $221 billion, Musk’s lifestyle choices continue to defy expectations.

In 2021, he announced via Twitter that he had sold most of his physical possessions, including his California mansions totaling more than $100 million. He also sold off approximately $15 billion worth of Tesla stock.

Musk reportedly downsized his living space significantly and moved into a tiny 75-square-foot prefab home worth around $50,000 located near SpaceX’s Starbase in Boca Chica, Texas.

This move was seen as symbolic of his desire to live a minimalist lifestyle while dedicating himself to his companies’ missions.

A Family Unlike Any Other

Though unconventional, Musk’s approach to family and parenting is deliberate. He has spoken candidly about the future of civilization and the importance of maintaining population growth. With seven children and counting, Musk appears to be living by those beliefs.

Grimes has echoed this sentiment, stating that they hope to have more children together, even if they’re no longer a romantic couple. “He sees me as a friend and his baby mama,” she said.

“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.”

Looking Ahead

While Elon Musk continues to dominate headlines with groundbreaking ventures in electric vehicles, space exploration, and AI, his personal life remains just as headline-worthy.

The birth of Exa Dark Sideræl marks another chapter in a life that seems to be as dramatic and futuristic as the technology he creates.

Whether through business or family, Musk continues to challenge norms and expectations. And with Grimes still close in his orbit, it’s clear that the Musk family story is far from over.