"He's also Chicago's twin lol I'm sure he will change a lot but now he looks just like her", she added.
Kim Kardashian's newborn son is already taking after his family members.
A source tells ET, "Kim and Kanye feel complete with the addition of their newest son".More news: Bill implementing Brexit deal to be introduced in early June
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Sharing a photo of her grandmother, MJ, raising a martini glass, Kendall simply wrote, "happy mother's day".
A few days later, Kim and Kanye's surrogate went into labor and they welcomed their fourth child.
Kim and Kanye have yet to share the name of the child or any photos of him, but the Keeping Up With the Kardashians star did say in a later tweet that their newborn son was "Chicago's twin".
"Happy Mother's Day to all of the attractive Moms out there, and to the women who are mentors and mother figures to someone special", Kris wrote on Instagram, sharing an album of photos of women in the family.
"Ever since what's happened with Tristan and I, nobody knows I fight an inner battle with myself in regards to what is the best thing to do for my relationship and for me", she previously stated.
They did have a FaceTime session with Jenner, however, so she could see her new grandchild. Jenner also teased that she has even more serums in the works as well as specialized products for different skin types. "Same child", Kris said. Their first two children North (5) and Saint (3) brought the Influencerin self to the world.