Billionaire Elon Musk, who is a close adviser to U.S. President Donald Trump, has another child, his 14th. His latest child, a son, is with Shivon Zilis, an executive at Musk's Neuralink with whom he already has three other children.

“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.