Musk's first wife, Justine Wilson, is a fantasy and sci-fi author with whom he had six children. Their first child, Nevada Alexander Musk, was born in 2002 but tragically died due to Sudden Infant Death Syndrome. The couple later had twins, Griffin and Vivian, in 2004, followed by triplets, Kai, Saxon and Damian, in 2006.

On Tuesday, February 11, video of Elon Musk, 53, and his son X Æ A-Xii, whom he shares with Grimes, was seen around the country as Musk made remarks from the Oval Office alongside President Donald Trump. X, 4, was there as his father spoke to the press.