There he is! Fans were in for a surprise when former Jon & Kate Plus 8 star Jon Gosselin took to Instagram on Saturday, May 12 to share a rare photo of his son Collin Gosselin. Fans haven't seen a picture of Collin since 2016 when the teen was enrolled in a program for special needs children. But Collin looked happy and healthy in the pic, and he even flashed a smile when he posed with his dad and his sister.

"Glad I could celebrate my son Collin’s 14th birthday with him and his sister!" the 41-year-old wrote in the caption. It looked like Jon enjoyed a small, intimate birthday dinner complete with pizza and a birthday cake with two of his kids, and fans took the comments to gush over Collin.

"I am SO [sic] glad you posted this Jon. I think I can speak for us all when we say we have been seriously wondering about him and how is is. He looks happy and boy, has he grown up. He looks like you. Aw, thank you for posting. Hope is is doing well. Happy birthday to all of them," one fan wrote while another commented, "Yay! Soooo [sic] glad to see Collin!!!!! Happy birthday to you guys!!! Yay Jon!"

It's great to see the kids spending time with their dad, especially since he has a pretty hard time co-parenting and getting vistation of his children because of the nature of his relationship with his ex-wife, Kate Plus 8 star Kate Gosselin. Back in 2016, Jon revealed to Entertainment Tonight that he hadn't seen all eight of his kids — he shares 17-year-old twins Mady and Cara and 14-year-old sextuplets Hannah, Alexis, Leah, Collin, Joel, and Aaden with Kate — together in years.

Things took another turn when Kate enrolled Collin in a boarding school for children with special needs and behavioral problems, and Jon claimed that Kate didn't tell him exactly where she sent their son. Collin seemed to be missing from family gatherings ever since he was sent away, but it looks like Collin and his dad have since reunited and he got to partake in some birthday festivities.

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