Country singer Thomas Rhett and his wife, Lauren Atkins, welcomed their second daughter Saturday, People reported.

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"Our baby girl is here," Atkins said on Instagram Sunday. "Sweet Ada James Akins came into the world at 10:28 last night after almost 36 hours of labor (only Jesus got me through that-& she is sooo worth it). She weighs 7 pounds 3 ounces and is so stinking cute I just can't take it! We are all doing well now, just resting. Thank y'all for your prayers-she is a miracle and God is so good. Thomas Rhett and I are so I love with her."

Ada joins sister Willa Gray, who Atkins said is “so excited to finally have a baby sister.”

Willa, 21 months, was adopted by Rhett and Atkins from Uganda in May.

Related: Singer Thomas Rhett and wife Lauren celebrate pregnancy, adoption of new baby

Rhett also shared the news on his own Instagram page.

"It was truly the most amazing thing I have ever experienced," Rhett said of the birth. "I can't believe that we have two daughters!! My wife @laur_akins labored almost 36 hours. She is by far the strongest human being I have ever met and I have a new found respect for moms around the world. We are so excited that Willa Gray has a baby sister! Thank you Lord and everyone for the prayers."

The singer and his wife announced they were expecting two babies in February, adopting one from Africa and expecting another biologically.

"Our hearts are exploding with happiness for y'all to meet our new baby who we are bringing home from Africa soon who is also going to have a little brother or sister because, SURPRISE! There's a sweet baby in my belly, too," Atkins said in an Instagram post at the time.