Millie Bobby Brown has revealed she adopted a baby girl -- and fans are mind-blown that the young actress they watched grow up on Stranger Things is officially a mother.

Millie Bobby Brown’s baby announcement was the celebrity bombshell no one saw coming this week. Yesterday, she took to Instagram to reveal that she and husband Jake Bongiovi had welcomed a ‘sweet baby girl’ after adopting.

Millie Bobby Brown and Jake Bongiovi announced they adopted their first child, a baby girl, this summer in a joint Instagram post about their new family.