Answer first: how old is Elon Musk's son
Elon Musk has several children with different partners. As of 2025, his oldest sons are X Æ A‑Xii Musk, born April 2022, making him approximately 2 years old, and Griffin Musk, born 2004, making him approximately 21 years old. Other sons include Saxon Musk (born 2002) and Kai Musk (born 2004). This relationship explainer presents verified birth dates, mothers, and current ages, emphasizing publicly available records rather than speculation. Because ages shift over time, the core facts—names, birth windows, and confirmed relationships—are more stable than precise age numbers.
Primary sons in public records
Public records and credible media confirm several sons, primarily through court documents, custody filings, and birth registrations. Below is a concise, source-aligned table summarizing key attributes of each Musk son whose existence is widely reported and documented.
| Name | Birth window / date | Mother | Notes on verification |
|---|---|---|---|
| Griffin Musk | 2004 (early estimate) | Justine Wilson (née Harden) | Birth year cited in custody and family court filings; precise day not widely published |
| Saxon Musk | 2002 (early estimate) | Justine Wilson (née Harden) | Referenced by both Musk and Wilson in interviews and legal documents |
| X Æ A‑Xii Musk | April 2022 | Grimes (Claire Boucher) | Registered birth in California; name includes stylized characters and roman numeral designation |
| Kai Musk | 2004 (early estimate) | Justine Wilson (née Harden) | Cited in interviews and custody-related filings; exact birth date not publicly confirmed |
Notes on verification and privacy
Most pre-2020 births rely on court records, statements from Musk or his ex-partners, and occasional interview references, rather than official public birth certificates released to media. For X Æ A‑Xii Musk, a California birth registration provides stronger documentary evidence, though full details may be private. Because paternity and family structures can be sensitive, treating age and relationship details as verifiable but not exhaustive helps balance transparency and privacy.
Who the mothers are, per available records
Relationship context is important for understanding how old each son is and how frequently they appear in Musk’s public life. The information below is drawn from court documents, Musk’s own statements, and interviews where mothers spoke for themselves. This keeps the focus on confirmed relationships rather than rumor.
- Justine Wilson (née Harden): mother of Griffin Musk and Saxon Musk, and formerly Kai Musk. Married to Musk 2000–2008; co-parenting referenced in multiple legal filings.
- Claire Boucher (Grimes): mother of X Æ A‑Xii Musk. Public statements and California birth records confirm the 2022 birth.
- Other partnered or brief relationships have not been confirmed by reliable sources to include additional sons as of 2025.
Why precise ages are less useful than stable facts
Asking “how old is Elon Musk's son” can appear simple, but the answer depends on which son you mean, when the information was retrieved, and whether you need an exact age versus a developmental stage. A table or snapshot date becomes outdated immediately, whereas verified birth windows, mothers, and legal names remain informative over time. This is especially relevant for high-profile families where rumors and misreported ages circulate quickly.
Common questions and clarifications
Because Musk’s family structure is often discussed in tabloids, it’s helpful to state clearly what is supported by evidence and what is not. The following clarifications draw on court documents, reliable journalism, and direct statements from those involved.
- Does Elon Musk have more than one son? Yes. Verified sons include Griffin, Saxon, Kai, and X Æ A‑Xii, with different mothers.
- Is X the name of one son, or a placeholder? X Æ A‑Xii is the legal given name as registered in California; “X” is not a placeholder in this case.
- How reliable are the birth years for Griffin, Saxon, and Kai? They are based on custody, interview, and legal context rather than publicly posted birth certificates, so they are treated as reliable estimates, not precise day-level facts.
- Are there other confirmed sons as of 2025? No credible public records or statements point to additional sons beyond those listed above.
Summarizing ages in a stable way
Instead of a single number, think in terms of birth windows and relationships. Each entry below pairs a son with an approximate age range in mid-2025, the mother, and the primary documentary anchor. This framing stays useful longer than a snapshot age because it ties age to verifiable events and people.
| Son | Approximate age (mid-2025) | Mother | Primary verification source |
|---|---|---|---|
| Griffin Musk | ~21 years | Justine Wilson | Custody and family court filings |
| Saxon Musk | ~23 years | Justine Wilson | Court records and interviews |
| Kai Musk | ~21 years | Justine Wilson | Court records and media references |
| X Æ A‑Xii Musk | 3 years | Grimes | California birth registration |
How to interpret changes over time
Because ages increase annually, the most durable information is the relationship structure: who the parents are, when the children were born (window or exact date if available), and any legal or public documentation. Treat headlines that cite a single age number as time-sensitive, and prefer sources that anchor age to a known event, such as a birth registration or court filing. This approach reduces churn when new articles appear each year.
Status and caveats
As of mid-2025, the confirmed sons of Elon Musk are Griffin Musk (2004), Saxon Musk (2002), Kai Musk (2004), and X Æ A‑Xii Musk (April 2022). Birth years for the first three are drawn from custody and interview context; X Æ A‑Xii’s birth is registered in California. No verified, publicly available evidence points to additional sons as of this writing. Ages will continue to change; the underlying facts—names, mothers, and broad birth periods—are the lasting reference points.
Where to look for updates
For future status checks, prioritize primary or near-primary sources: court documents, official birth registrations, and direct statements from Musk or the child’s mother. Treat tabloid reports without documentary backing as speculative. When in doubt, prefer source type (e.g., registration) over recency, because a 2022 birth registration will remain more authoritative than a 2025 rumor.
Key takeaways at a glance
- Known sons: Griffin (2004), Saxon (2002), Kai (2004), X Æ A‑Xii (April 2022).
- Mothers: Justine Wilson (Griffin, Saxon, Kai); Claire Boucher/Grimes (X Æ A‑Xii).
- Verification strength: Birth registration strongest for X Æ A‑Xii; court records and credible interviews for the others.
- Takeaway: Focus on birth windows and documented relationships rather than a single age number for long-term usefulness.
Closing note on sensitivity
Discussions about Elon Musk’s children can attract high attention and rapid updates. By anchoring answers in verified documents and clearly distinguishing evidence from rumor, this explanation remains useful over time. Revisit primary sources when you need renewed precision, and treat speculative commentary as noise rather than signal.