They used to be on a show called 19 Kids & Counting — and while it’s been off the air for nearly two years now, it most definitely was a fitting title to describe the Duggars because their family is constantly growing! Aside from Jim Bob and Michelle Duggar‘s kids marrying off and having babies left and right, the family matriarch and patriarch adopted their twentieth child back in November — a boy named Tyler. He was first introduced earlier this year on the family’s Facebook account when they celebrated his ninth birthday, and it turns out Tyler already had close family ties with the reality stars. So, who is Tyler? Keep reading below to find out!

Tyler was already part of the Duggar family before his adoption

In Touch exclusively revealed back in November that Jim Bob and Michelle were granted permanent guardianship over Michelle’s great-nephew, Tyler — after originally obtaining temporary guardianship two months prior.

“Jim Bob and Michelle couldn’t be happier right now,” a source told In Touch exclusively at the time. “Jim Bob and Michelle have made the child feel right at home. They treat him like their own and he looks up to them as parents.”

Tyler’s biological mom is Rachel Hutchins

Rachel welcomed her son when she was a teenager and not married, and she originally “gave up custody of her son [in August 2015] to her mother, Michelle’s sister Carolyn. But in July, Carolyn suffered a stroke.” Rachel went through a string of financial and legal woes [at the time she was also homeless and unemployed], and she was struggling to care for her child — that’s when her aunt and uncle stepped in.

But even though Jim Bob and Michelle are Tyler’s legal guardians, Rachel is still in his life. She was granted supervised visits with her son after her aunt and uncle obtained permanent guardianship of Tyler last November.

Happy 9th Birthday Tyler! We are so glad to have you in our home and a part of our family! Your bright smile and sweet…

Posted by Duggar Family Official on Friday, February 10, 2017

The Duggars treat Tyler as if he were their own

Just like with their biological children, Michelle and Jim Bob made sure to spoil Tyler with some extra attention on his birthday back in February, and they shared a sweet birthday message to him on their official Facebook page.

“We are so glad to have you in our home and a part of our family! Your bright smile and sweet spirit brings much joy to us all! Jackson loves having a ‘little brother/cousin’ to ride bikes and play with and read your bibles together [sic],” they wrote in their caption. “Our prayer is that each day you will seek God’s will for your life and that God will use your life in a great way.”