Thomas Rhett and his wife have just welcomed their adopted daughter home, and the country superstar shared a sweet photo of mother and daughter for Mother's Day, gushing over how naturally she takes to her new role.

Rhett and wife Lauren Akins announced on Friday (May 12) that they had finally brought home their daughter, Willa Gray Akins, more than a year after meeting her in Uganda. On Sunday morning (May 14) the "Craving You" singer posted an adorable Instagram photo of little Willa in her pajamas out in the yard with her mom, sweetly giving her a petal from a flower as Akins bends over to take it from her.

"Babe.. not only are you the hottest mom you are the sweetest, funniest most kind hearted human being that I know," Rhett writes. "I know you didn't plan on marrying a singer when you were sitting in your 3rd grade class room but I'm so glad you did. I couldn't imagine my life without you. Seriously you know how lost I get when you are gone for 2 weeks," he adds with a laughing icon.

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"I love you so much and happy 1st Mother's Day. You already are a rock star at being a mom," Rhett states, ending with, "You + me+ Willa."

Akins turned to Instagram on Friday to thank everyone who stood by the couple over the long "emotional roller coaster" of the adoption process, especially her parents, who traveled to Uganda to bring Willa home because Akins is not allowed to fly right now. That's because she is pregnant with her first biological child, also a girl, who is due in August.

Rhett and Akins announced her pregnancy and the adoption in February. They were already far into the adoption when Lauren discovered she was pregnant, and decided to move forward because the couple have always been interested in adopting a child. Akins' mom was adopted, and Akins is also active with the non-profit group 147 Million Orphans, for which her husband recently designed a T-shirt to raise funds.

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