SHOCKING! Kris Jenner REVEALS How She Found Out About Ex-Husband Caitlyn Jenner’s Gender Transition! (Details Inside)

The Kardashians' 67-year-old'momager' had divorced the former athlete at the time of the transition, with her former boyfriend Bruce Jenner transitioning to Caitlyn Jenner in April 2015 and officially changing her name that September.

The upcoming documentary 'House of Kardashian', which will premiere on Sky in the UK next week and in the US later this year, reportedly includes the claim Kris Jenner didn't find out from the truth from her husband of 23 years but instead from people at E!, the home of 'Keeping Up with the Kardashians'.

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According to a source, "Kris first found out about Bruce transitioning from E! execs, although Bruce eventually spoke to Kris."

Despite the fact that the couple was divorced at the time of Caitlyn's transition, a source told Page Six that Kris was the "one true love of Bruce's life," and Caitlyn, 73, wants to make amends.

Kendall Jenner, 27, and Kylie Jenner, 26, are the children of the former couple, who divorced in 2013.

They also have had a falling out in recent years over how much Kris supposedly knew about Bruce's gender troubles.

"Caitlyn will always have love for Kris, and even after the divorce - which had nothing to do with transitioning - really has come to regret not talking with Kris personally first," an insider told Page Six.

"It hurt Caitlyn to learn that Kris learned about it from network executives."- the insider added.

"Caitlyn not only partook in the documentary to defend her family, but to set the record straight that Kris really had no idea - other than what Kris discussed in Vanity Fair."

Kris confessed in the July 2015 issue of Vanity Fair that she was aware of her ex's history of temporarily using gender-affirming hormones before they met.

"When I met Bruce, he told me that he had done hormones back in the early '80s," she explained.

"This was a conversation that happened in the early 1990s. So, what he was telling me happened a decade ago, and he never disclosed it to me."

Caitlyn has revealed that her transition strained her relationship with her ex-wife.

According to the source, Caitlyn's 2017 memoir, 'The Secrets of My Life,' caused family strife.

Caitlyn stated in her best-selling biography, "I tell Kris about my gender issues before I make love to her... How much Kris could intuit about my gender difficulties will always be a point of contention between Kris and me. She says she was taken aback by my eventual transition to Caitlyn.”

"I told her I dressed as a woman, and she knew I did, because I did it several times in front of her after we were married."- she added.

In July 2015, Kris told Vanity Fair of her ex, "Why would you want to be married and have children if this is what you wanted since you were a little boy?" Why wouldn't you explain everything to me?"

Caitlyn Jenner revealed on the UK chat show 'This Morning' that she rarely communicates to Kris or the Kardashian children she helped raise: Kourtney, 44, Kim, 42, Khloé, 39, and Rob, 36.

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"Well, Kris, I really don't talk to anymore," she explained. "Yes, it is sad."