Jon Gosselin isn't holding anything back.

The former Jon & Kate Plus 8 star got candid about the lack of communication he has with six out of his eight children with Kate Gosselin, expressing how he believes she is responsible for their the estrangement.

"I think it's maybe parent alienation," Jon said on The Domenick Nati Show July 18. "You're swaying someone."

As the 47-year-old explained, "Some people just can't not be alone, so they'll do anything or if they have the means, they're going to sway their children or whoever is in their life to not go with the other parent."

The 47-year-old also noted that the last time he spoke to his ex-wife of 10 years—the couple split in 2009—was when they were both in court in 2018, at which time Jon was given custody of children Hannah and Collin, both now 20, who are the only kids he currently speaks to.

E! News has reached out to Kate for comment, but has not heard back.

Jon explained that Hannah does still have a relationship with her mother and siblings, including twins Mady and Cara, 23, and the other sextuplets, Alexis, Aaden, Leah and Joel, also 20. In fact, Jon's girlfriend Stephanie Lebo has even spoken to Kate through Hannah during FaceTime calls with the family.

"Everything seems copacetic," he continued. "They just said 'Hi' or something like that." He added that Kate likely "wanted to know the woman that's influencing her children."

He also believes that it might be simpler for his children to talk to Stephanie than talking to him directly, adding, "Under the scrutiny of everything that transpired, it might just be easier for them to talk to a third-party individual that's totally integrated into my life."

Still, Jon is optimistic that one day he might have a relationship with his other six children, expressing that he will definitely be inviting them to his and Stephanie's possible future wedding through daughter Hannah.

And as he told E! News in April, he is hopeful his children "will come around and maturity will set in."

For a look at Jon and Kate's eight kids through the years, keep reading.

On Mother's Day 2024, two days after the former couple's sextuplets turned 20, Kate shared a tribute the four who lived with her: Alexis, Aaden, Joel and Leah.

"No more teenagers in this house! Happy 20th birthday, my forever babies! I love you!" she wrote on Instagram. "Who feels old? I know I do! #20yearsold #ItsaPICKLE."

Hannah shared new pics of herself on her and the other sextuplet's 20th birthday May 10.

On to the next chapter! The sextuplet graduated from high school in 2023.

Jon shared a pic of sextuplets Collin and Hannah graduating from high school in 2023, years after they had moved in with him.

Kate appears with twin Mady and Cara in New York City in 2019.

"Happy 18th birthday!" Jon wrote on Instagram in 2022. "Today is your birthday we gonna say it loud. I love you. Love, Dad."

"Our big celebration of #15 is finally winding down here! We celebrated ALL DAY LONG, beginning with a present at 6:30 am before school! I'm so very thankful for my ‘babies'.... somehow they are 15 already?!" Kate wrote on the special milestone in 2019. "I'm amazed by them each day! I'm so proud of the positive qualities I've seen developing as they edge closer to adulthood." 

"This was yesterday! Feels like school never ended...and they're already back! #SeniorYear #EighthGrade #ProudMom," Kate wrote on Instagram in 2018.

"Happy 15th Birthday Hannah, Collin, Alexis, Aaden, Joel and Leah!!!! Wow I can't believe you are 15!!! Time is flying by!!!" Jon Gosselin shared on Instagram when posing with Hannah and Collin Gosselin. "I love you all very much. I wish you the best day ever and I hope you enjoy your birthday celebrations today and this weekend!!! Love always, Dad." 

"My beautiful 'little girls' .... they keep reminding me how many days until they turn 14. Today it was '12 days til we turn 14, Mom.' HOW'S THAT EVEN POSSIBLE?!" Kate shared with her followers in 2018. "I told Leah that she's too small to turn 14. She said 'Yeah, true. Are you sure I'm not turning 11 or 12?' I'm positive. I gave birth to you. They'll always be my babies....I love them so very much!" 

"I can't believe they're 13!" Kate Gosselin wrote on Instagram when celebrating a major birthday for her sextuplets. 

Rewind to 2014 when Kate and her children found themselves visiting Alaska. 

Kate also treated her twin daughters Cara Gosselin and Mady Gosselin to a trip to New York City in 2014, where they stopped by the Manhattan Hotel. 

"A precious Christmas memory. My 6 were 6. Christmas Eve 2010 and they're SO excited for Christmas!" Kate Gosselin wrote on Instagram with a throwback photo. "Look at those adorable smiles! #TheyAreMyHeart #My8ReasonsToKeepOnKeepingOn #NoMatterWhat #TrueLoveX8." 

Back in October 2007, Jon and Kate Gosselin gathered their eight kids together for a trip to New York City. First stop? A visit to NBC's Today show.