Earlier today, several other people in Katz shared the little princess's social media posts.
Penelope's grandmother, Chris Jenner, shared a photo collage of the child on Instagram.
"Happy Birthday to our lovely princess, our little mermaid Penelope! !
Dear Angel, we love you so much! !
"Happy birth day Penelope Angel sweet girl family," Chris wrote . ".
Those Kardashians definitely know how to do some lovely kids!