Elon Musk and Shivon Zilis have added another member to their growing family, welcoming their fourth child together, a son named Seldon Lycurgus.
Zilis shared the joyous news on February 28, 2025, in an X post, introducing her son and expressing her love. She described Seldon as “built like a juggernaut, with a solid heart of gold,” and added, “Love him so much ♥️.”
The Tesla CEO, 53, shared a simple yet heartfelt response to Zilis’ post, with a heart emoji.
This marks the couple’s second son, as they also share twins, Strider and Azure, who are three years old, and a daughter, Arcadia, who celebrated her first birthday on the same day.
Zilis marked Arcadia’s milestone with a heartfelt message, writing, “Happy 1st birthday, darling Arcadia. Mommy loves you with all her heart 💞.”
Musk and Zilis first revealed they had twins in November 2021, born just weeks before Musk and musician Grimes welcomed their daughter Exa Dark Sideræl via a surrogate. Since then, Musk’s blended family has made headlines for its dynamic relationships.
In a more public step towards family unity, Grimes and Zilis connected on social media in 2023, acknowledging the efforts to understand each other and create an amicable environment for the children.
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Grimes, who shares three children with Musk, also celebrated the news of Zilis’ newest addition, stating their connection had been “overdue.”
The latest announcement of Musk’s 14th child follows the February 2025 revelation that author Ashley St. Clair, Musk’s reported partner, also gave birth to their child, named R.S.C.
In the midst of growing media interest, St. Clair revealed the baby’s existence but had previously kept it private for safety reasons.
A judge has since ordered Musk to attend a hearing in May for a custody decision regarding RSC.
Musk, who first became a father in 2002 with his ex-wife Justine Wilson, now has 14 children with four different women, including his late son Nevada Alexander, who tragically passed away at 10 weeks old.
His children include twins Vivian and Griffin, 20, and triplets Kai, Saxon, and Damian, 19.
