X Æ A-Xii, widely known as Lil X, is the oldest child of Elon Musk and musician Grimes (Claire Boucher). Born on May 4, 2020, he is 6 years old. His unusual name, public appearances alongside his father at high-profile corporate events, and the high-visibility custody discussions surrounding him have made him one of the most recognized celebrity children in the world.
Understanding his life involves looking past the headlines and exploring his birth details, his family dynamics, and the unique environment of growing up with the founder of Tesla and SpaceX. This article breaks down his exact age, background, sibling dynamics, and public footprint without the fluff.
Exact Age and Birth Details
Lil X was born on May 4, 2020, in Los Angeles, California. As of June 2026, he is 6 years old.
His birth immediately sparked global media attention due to the unconventional name chosen by his parents: X Æ A-12 (later modified to X Æ A-Xii to comply with California state laws regarding vital statistics). Grimes explained the pronunciation and meaning of the name shortly after his birth:
- X: The unknown variable.
- Æ: Elven spelling of AI (love and/or artificial intelligence).
- A-Xii: Contributed by Elon Musk, referencing Lockheed's precursor to the SR-71 Blackbird aircraft, known for its speed and lack of defensive weapons.
Despite the internet fascination with his moniker, his parents typically refer to him simply as "X" or "Lil X" in daily life.
Family Dynamics and Siblings
Lil X is part of a large and evolving blended family. His parents, Elon Musk and Grimes, had an on-and-off relationship before officially separating, though they share parenting responsibilities.
Following Lil X's birth, Grimes and Musk welcomed two more children via surrogacy:
- Exa Dark Sideræl Musk (known as Y), born in December 2021.
- Techno Mechanicus (known as Tau), born around June 2023.
In addition to his full siblings, Lil X has several half-siblings from Elon Musk's previous marriage to author Justine Wilson. These older siblings include twins Griffin and Vivian, and triplets Damian, Saxon, and Kai, born in the mid-2000s.
Public Appearances and Life in the Spotlight
Unlike many children of billionaires who are kept strictly out of the public eye, Lil X has frequently accompanied his father to work environments, corporate announcements, and high-profile interviews.
- Tesla and SpaceX Facilities: He has been spotted sitting on his father's shoulders during factory tours, earnings calls, and rocket facility visits.
- Global Travel: Lil X has traveled internationally with Musk, attending high-level meetings with world leaders, tech executives, and media figures.
- Social Media Presence: He frequently appears in photos and videos shared by Musk on social media platforms, often depicted observing engineering projects or playing in office spaces.
While these appearances offer a glimpse into his upbringing, they also spark ongoing public debate regarding child privacy and media exposure for minors.
Custody and Legal Background
The relationship between Elon Musk and Grimes has involved complex legal proceedings regarding custody and parental rights across jurisdictions like California and Texas.
Legal filings between the couple highlighted the private challenges of co-parenting high-profile children while managing massive global enterprises. Despite these legal maneuvers, both parents have maintained that their primary focus remains the well-being and upbringing of their children.
Frequently Asked Questions
What is Lil X real legal name?
His birth certificate lists his name as X Æ A-Xii Musk. California law prohibits numbers in names, which is why the original "A-12" was changed to the Roman numeral "Xii".
Where does Lil X live?
He primarily splits his time between locations in Texas and California, depending on his parents' working schedules and custody arrangements.
Does Lil X go to a traditional school?
Specific details regarding his formal education are kept private for security reasons, though reports indicate his parents explore customized, flexible learning environments.
Why do people call him Lil X?
Elon Musk frequently uses the nickname "Lil X" in interviews and social media posts when referring to his eldest son with Grimes, distinguishing him from his other children.
