"Bringing in my birthday tonight with my most special gift. What was life before you, Stormi. I love you, my little angel," she wrote for the caption on the first photo.
"My heart," she wrote on the second.
Earlier this year, Kylie said she was done sharing pictures of her new baby on the platform because of some of the negativity surrounding the photos. A source close to Kylie told People that the reality star was "shocked" at the comments people were making.
"Kylie felt so protective of her baby when she was pregnant. This is why she didn't share any bump pictures while she was pregnant. After Stormi was born, Kylie was the proudest mom.
"She couldn't wait to show off Stormi to her fans. She posted pictures because she was so excited to be a mom. Unfortunately, social media is a crazy place. People have been making nasty comments.
"Kylie is shocked and doesn't want her daughter’s pictures to be a part of something negative. She might reconsider in the future, but for now, she won’t post any more photos of Stormi’s face."
But it looks like an occasion as major as Kylie's 21st calls for new baby pics, and thank gawd because that is ONE CUTE BABY.
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This article originally appeared on Cosmopolitan.com. Minor edits have been made by the Cosmo.ph editors.