“Discussed with Elon and, in light of beautiful Arcadia’s birthday, we felt it was better to also just share directly about our wonderful and incredible son Seldon Lycurgus. Built like a juggernaut, with a solid heart of gold. Love him so much," Zilis wrote, also revealing the name of the couple's previously-born child in the announcement.

Elon Musk and tech executive Shivon Zilis welcomed their fourth child together, according to an X post by Zilis on Friday.

Elon Musk is a father once again. The Tesla CEO and his girlfriend, Shivon Zilis, recently welcomed a baby boy, though it's unclear when. Zilis shared the news in a post on X (formerly Twitter) on Friday,