Elon Musk Is a New Dad Congratulations to Elon Musk and his girlfriend Grimes on the birth of their child. If you remember, back in January they announced they were expecting in a racy post on social media. The baby is now born and details about the new bundle of joy haven’t been given out just yet. This child with his girlfriend of two years is Elon’s sixth. He also has five children with his ex-wife Justine Wilson. Did you even know that Musk has a girlfriend? Did you know Musk had five other kids?