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.

Reporters asking Mr Musk questions also turned attention to his four-year-old, named X Æ A-Xii, who was captured making faces as he clung to his father's shoulders. And, at one point, Musk’s son was also seen picking his nose.