Kim Kardashian Celebrates North West's Third Birthday!

Happy birthday to North West!

Kim Kardashian and Kanye West‘s daughter turns 3 years old today (June 15).

PHOTOS: Check out the latest pics of Kim Kardashian

The 35-year-old reality star took to Instagram to post a cute video of herself telling Nori not to get any bigger.

“She promised me she wouldn’t get any bigger,” Kim captioned it. “I can’t believe my baby girl is 3 years old today!!!! Northie I love you so much I can’t even explain it! Happy Birthday to my favorite mermaid!!!”

Watch the adorable video below!

FYI: North is wearing a PilyQ swimsuit.