HANNAH and Collin Gosselin have graduated from high school in front of their proud dad Jon and a surprise guest - their estranged mom Kate.

Jon, 46, who has had full custody of both Hannah and Collin, was surprised ex Kate, 48, decided to come to their high school ceremony, as she has been absent for a lot of their lives after the former couple went through a long and bitter custody battle, a source told The U.S. Sun.

Hannah and Collin, both 19, donned red gowns as they posed for pictures with their dad at their Pennsylvania high school.

Jon and his two kids arrived at the ceremony in Collin's new convertible Mustang.

Jon's mom and his ex-girlfriend Colleen also attended the ceremony and sat behind Kate.

A source said Jon knew that Kate would be attending because she has started talking to Hannah again, but was still surprised at her decision to come.

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The exes did not speak to each other throughout the event.

Kate also did not speak to her son Collin, and their relationship remains estranged, the source added.

Afterward, the dad of six cooked a barbecue for friends and family to celebrate.

A source told The U.S. Sun: “Jon was super proud to see his kids graduate. They’ve all been through a lot these past few years so it was a really nice family celebration.

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“Jon and the kids arrived at the graduation in Collin’s brand new convertible Mustang. They were all smiles and ready to graduate.  Collin and Hannah looked like best friends. 

“Jon wanted it to be a day to remember and threw a huge BBQ cooking up a storm. Friends and family came to celebrate. Jon’s mother also came to celebrate."

The inside added: “Kate showed up, which was a bit of a surprise, considering she truly has been missing for most of Collin's adult life and barely has seen Hannah.

“Jon’s ex Colleen, who has remained close to the kids, came to see them graduate and surprisingly sat directly behind Kate. 

“Jon and Colleen have remained friends and he was happy to see her. It was a bit intense for Jon having both his ex-girlfriend and ex-wife there, but everyone was civil and the kids were the number one priority. 

“Jon and Kate did not speak at all - she was sat at the opposite end of the place and they didn’t have to see each other. Although Colleen sat right behind Kate and that was a very strange sight! They didn’t even look at one another.

It was a bit intense for Jon having both his ex-girlfriend and ex-wife there, but everyone was civil and the kids were the number one priority."

“Jon knew Kate was coming because she and Hannah have spoken a few times and she said she would be there.

“Kate and Collin are still not talking, but she saw him graduating too as it was at the same time as Hannah. 

“Jon was surprised that Kate had decided to come just because she has been absent for a lot of their lives, so he wasn’t expecting that she’d show up to graduation.”

RECONNECTION

Jon previously revealed how Hannah reconnected with her mom and the siblings in her care Alexis, Leah, Joel and Aaden on the sextuplets' 19th birthdays.

While Hannah spoke with her estranged family members, Jon told The U.S. Sun he, unfortunately, was unable to talk to his other four kids on their birthday.

Jon did wish them well on social media, as he captioned a photo of the sextuplets: "HAPPY 19th BIRTHDAY to all my Kids!! I love you all so much!!"

Back in May he also revealed he wouldn't be attending his other kids' graduations.

'I'LL NEVER GIVE UP'

But he says the door is always open when it comes to having a relationship with the four sextuplets, and twins Mady and Cara, 22.

“I will never give up trying to talk to my children. I’m hoping with social media that maybe they might reach out to me at some point," he told The U.S. Sun in a previous interview.  

“The door is always open to rekindle any kind of relationship. I've tried for years for any interaction with any of my other kids, but nothing yet.”

The former Jon & Kate Plus 8 stars were involved in a nasty custody battle through the years that ended when the children turned 18. 

CUSTODY BATTLE OVER

Jon previously told The U.S. Sun of how it feels for the 14-year court war to come to an end: "I'm in a pretty euphoric place right now.

“It's finally over, I don't have to deal with her, with court hearings, lawyers - it's done. I can get on with my life, it's such a good feeling. I don't even think it's sunk in yet because I've been going to court for so long.

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"The thing in these cases is that there's no winning. The only winners are the lawyers. The kids always lose out- it's not a soccer match, there's never a winner.

"But now I'm finally moving on with my life."

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