Former "19 Kids and Counting" stars Jim Bob and Michelle Duggar have truly welcomed their adopted son, Tyler, as one of their own. When the young boy recently celebrated his 10th birthday, the Christian couple showered him with lots of love on social media.

They shared two photos of Tyler with his now-siblings and wrote, "Happy 10th birthday Tyler, a whole decade now! You are such a joy and a delight! We are so thankful for you! We wish you a happy birthday and look forward to another great year!!"

The Duggar family's fans also extended their greetings to the young boy. "Happy Birthday handsome boy!! You are in a family that Loves you very much and has an amazing Love for the Lord!!" a fan wrote. "Happy Birthday, Tyler. You are [a] good fit with the Duggar children," another added.

However, there were some fans who don't know who Tyler is. "Happy Birthday, Tyler! But who is Tyler?" a netizen commented. Another posted the same question, adding that all of the Duggar kids have names that start with "J."

Tyler Wayne Hutchins is actually Michelle's great nephew. The boy's 23-year-old mother, Rachel Hutchins, Michelle's niece, but she struggled with raising him and so he was placed in the care of Michelle and Jim Bob.

Rachel agreed to sign off on the Duggars' guardianship, provided that they allow her supervised visits with her son. The court documents obtained by ET revealed that the Christian couple were granted temporary guardianship of Tyler after they filed an emergency petition on Aug. 26, 2016. The guardianship was made permanent on Nov. 21 that year.