'KUWTK' Mystery: Kendall Jenner Will Reveal Secret About Herself

Kendall Jenner is set to expose a secret from her past on Twitter on Sunday night, Jan. 6.

The mystery reveal will supposedly help others, but beyond that, what Kendall, 23, will talk about is a mystery!

Her momager, Kris Jenner, spread the word about her model daughter's social media event on Saturday, Jan. 5, posting a video of Kendall on Instagram.

In her caption, Kris wrote, "I'm so proud of my darling @KendallJenner for being so brave and vulnerable. Seeing you share your most raw story in order to make a positive impact for so many people and help foster a positive dialogue is a testament to the incredible woman you've become. Make sure to watch Kendall's Twitter on Sunday night to find out what I'm talking about and be prepared to be moved. #bethechange #shareyourstory #changetheconversation #proudmom #finallyasolution #authenticity #mydaughterinspiresme #getready."

In Kendall's own video, Kris' daughter is cryptic, but said it has something to do with when she was 14 years old.

Wearing a simple white tee shirt and speaking directly to the camera, Kendall indicated only that she wanted to help others through her story, noting, "I have this whole thing behind me…I'm very normal…I can connect with you…help you."

But it seems that shy Kendall, who's been seeing NBA star Ben Simmons, will join her famous sisters in telling all.

The Kardashians are known for their on-camera and social media revelations, whether it be Khloe complaining about disgraced baby daddy Tristan Thompson or Kourtney admitting that her longtime love Scott Disick was a "sloppy" drinker.

Kendall has kept relatively private in the flamboyant family, but apparently she's about to break her silence on something big.

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