Elon Musk and Grimes Welcomes 2nd Child 

Billionaire entrepreneur Elon Musk and the musician Grimes have had a second child,

a girl they named Exa Dark Sideræl Musk -- although the parents will mostly call her Y.

The 33-year-old Grimes said the baby was born in December

The birth of their first child, a boy born in May 2020, was followed closely in the press

Grimes first winced and acted evasively, she finally confirmed that, yes, she was a mom again.