At one stage, the child, known as X Æ A-Xii but commonly referred to by Musk as X, also seemed to pick his nose as Trump looked on with disdain.
Now 20 years old, Vivian, who legally updated her name and gender in 2022, expressed her disdain for her father's acquaintance, President Donald Trump, whom Elon supported during the election.
Elon Musk's son stole the show as he appeared at a peculiar joint press conference from the Oval Office alongside his father and President Donald Trump.
Upon making the announcement, Elon was quizzed by fans over the name of their baby - X Æ A-12 Musk.
Musk has expanded his brood as he and partner Shivon Zilis became parents to twins Strider and Azure, who arrived in 2021 just weeks before the birth of his and Grimes' third child.
