The Robertson family of "Duck Dynasty" fame is welcoming its newest member, Rowdy, to the family.

As earlier reported, in January, Willie and Korie Robertson announced they were in the process of adopting a 13-year-old boy, named Rowdy, to join their five biological children John Luke, Sadie, and Bella, adopted son Will, and their foster daughter, Rebecca, who first came to the family as an exchange student from Taiwan in 2004.

Last week, Korie took to Instagram to announce the adoption was finally complete by posting a new family photo: "It's official!!" she wrote. "Today Rowdy officially became a Robertson! So thankful for Godly attorneys and judges that made the day extra special. We told stories of the past year, we laughed, we cried, we hugged, we swore to love Rowdy forever and ever. #Godisgood (missed having @young_and_beardless @marykaterob and @johnreedloflin with us)."

Korie's biological daughter Sadie welcomed the newest Robertson on her personal Instagram account (@legitsadierob) as well. "Just landed back in Louisiana to take a good ole garage pic with the family to celebrate Rowdy's official adoption day!! Welcome to the family Rowdy Robertson," she wrote.

Rebecca also expressed her excitement over gaining a new brother, reposting Korie's photo to her Instagram page (@rebeccarobertson): "Photo taken right before we all cried our eyes out with joy in the courtroom. Rowdy's official adoption day! Love you Rowdy! We have loved you since the first time we saw you, but now you are bind to the law to love us back too," she wrote.

Earlier this year, Korie revealed that Rowdy - who she referred to as "amazing" - had been with their family since last May, and even attended their son John Luke's wedding to Mary Kate McEacharn. He "walked my grandmother down the aisle," said Korie.

During the Angels in Adoption Event last fall, Korie hinted about her family's plans to welcome another addition sometime soon, reports Country Rebel. "We are always open to adoption. We feel like adoption has blessed our family in so many ways. And we are so thankful for our kids both biological and adopted. So 'never say never.' That's for sure."

The family also revealed that for them, adoption is a calling and a gift from God.

"It's an expression of our faith," Willie told Dallas News earlier this year. "God's been so good to us."

"Children are never easy," Korie added. "But they're always worth it."