The 4-year-old son of the Canadian singer and the CEO of Tesla Motors joined President Donald Trump in the Oval Office on February 11.

Elon Musk visited the Oval Office to discuss the newly established Department of Government Efficiency (DOGE), bringing along his son, X Æ A-Xii, known as X, whom he shares with Grimes. X, who was seen making faces, captured fans’ attention, shifting the focus away from his dad.

The billionaire tech and his son watched as Donald Trump signed an executive order granting DOGE more power. Musk also addressed the press about the controversial work DOGE is doing, but as he spoke, X fully embraced his playful side.

He attracted attention by making silly noises, poking his dad’s ears, sitting on the floor, picking his nose, and even leaning over the Resolute Desk to whisper to the president. His behavior and appearance, captured on camera, delighted fans online, with one pointing out, “He takes him everywhere. Such a cutie.”

Others were charmed by X’s resemblance to his mother, as one remarked, “Aww what a cute kid he looks like his mom a lot.” His outfit also caught attention, with a fan noting, “X is adorable and so well-dressed!”

Fans continued to shower X with praise, “He’s adorable.” Others admired his behavior and curiosity, with one writing, “That little boy is very well-mannered and actively listening to all the things his dad is talking about. He will have a vocabulary that won’t stop. He is learning a lot.”

Another fan echoed this comment, “X was so well-behaved for a 4 yr old [sic] who had to withstand a fairly lengthy press conference!” Some couldn’t help but compare him to his father, “Handsome [sic] smart little boy like his dad 🇺🇸🙏.” Another user took a playful jab at Musk, “The kid behave is better than his own father, he’s not really normal [sic].”

Elon Musk shares X with Canadian singer Grimes, whose real name is Claire Elise Boucher. Grimes later admitted that she had no idea about X’s unexpected public appearance, only finding out when a random X user praised her son for being “very polite.” The user added, “You raised him well,” highlighting how he even asked Trump to excuse him so he could use the bathroom.

The singer responded with a mix of concern and relief, “He should not be in public like this. I did not see this, thank u for alerting me. But I’m glad he was polite. Sigh.” Grimes has been keeping her distance from Musk ever since they parted ways. The two welcomed X in 2020, with Musk sharing a sweet photo of himself holding the newborn, wrapped in a hospital blanket.

Grimes and Musk initially named him X Æ A-12, with the singer explaining on X what the full name meant. She wrote, “•X, the unknown variable ⚔️ •Æ, my elven spelling of Ai (love &/or Artificial intelligence) •A-12 = precursor to SR-17 (our favorite aircraft). No weapons, no defenses, just speed. Great in battle, but non-violent 🤍+ (A=Archangel, my favorite song) (⚔️🐁 metal rat) [sic].”

However, Musk quickly corrected her, “SR-71, but yes.” Grimes replied, “I am recovering from surgery and barely alive so may my typos b forgiven but, [expletive]. That was meant to be profound 🦔 [sic].” However, Musk and Grimes later changed their son’s name.

The news of the name change unfolded in a conversation on X. In a now-deleted interaction, a user known as @therealsainti asked “Did you change the baby name because of Californian laws? What is the baby’s new name?” Grimes answered “X Æ A-Xii.”

In another deleted comment, @obeah_mon noted, “Nice! Just removed the numbers to confirm to California law,” to which Grimes admitted, “Roman numerals. Looks better tbh.” David Glass, a family law attorney, also weighed in on the legitimacy of X’s full name in California, noting that it wouldn’t be accepted as valid by the state.

“In California, you can only use the ’26 characters’ of the English language in your baby name. Thus, you can’t have numbers, Roman numerals, accents, umlauts or other symbols or emojis. Although an apostrophe, for a name like ‘O’Connor,’ is acceptable [sic],” he said.

Musk and Grimes, who were together from 2018 to 2022, have two other kids together, whom they gave near-conventional names. Their other two children are called Exa Dark Sideræl, and Techno Mechanicus. The pair did not publicize their births unlike X’s and have since kept their lives away from the public’s eyes.