On New Years Day she shared a snap of her bump as she reflected on 2021.
She wrote alongside the image: "As 2022 is approaching I've been reflecting on this last year and the blessings that it brought but also the many heartaches it held.
"I will never forget this year and all the significant changes it made to my life. I pray this new year is filled with a lot of love for all of you and i hope everyone stays safe and healthy during this time."
Kylie had previously stated she had felt a huge pressure to have a second child and provide Stormi with a younger sibling.
The new baby boy brings up the number of grandkids Kylie's dad, Caitlyn Jenner, has to 20.