Thomas Rhett and Lauren announce the sex of their baby

Just last week, Thomas Rhett and his wife Lauren announced they were not only expecting, but also adopting a baby from Africa. 

Fans have been reeling to find out if the baby in Lauren's belly is a boy or a girl, and the answer came on Saturday afternoon. The happy couple hosted a gender-reveal party with their closest friends and family, cutting into a cake to find out -- it's a girl!

Thomas shared a video of the exciting moment on his social media.