Taking inspiration from her baby daddy Travis Scott's Grammy nominated album, Astroworld, Kylie pulled out all the stops for the bash, which included a giant inflatable entrance in the shape of the tot's face - a direct reference to Scott's album cover. "And what a great birthday party!".
Kylie's parents, Kris Jenner and Caitlyn Jenner, and sisters Khloé and Kourtney were also in attendance.
Not present for the over-the-top bash was Kim Kardashian West, who tweeted that she had a scheduling conflict.
This working carousel Cake was made by Julie Simon Cakes for Stormi Webster's first birthday party.
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The youngest of the Kardashian-Jenner clan introduced a brand new addition to the family, telling followers: 'You guys I adopted Wesley, ' an adorable puppy.
There was also a carnival game where guests could throw balls into what looks like a cutout of Stormi's open mouth, and yeah, I might go with a little macabre. The 'Stormi World' party might be one of the most epic KarJenner parties ever. Guests even had to walk through a very big blow-up of face head just to get into the party, which was a little weird.
And, of course, there were a slew of celebs that joined in on the fun, like DJ Khaled. "She's not pregnant, I think she and Travis are just practicing", said Jenner.
'I know you won't remember much about the first year of your life but i pray you'll never forget to keep sharing your laughter with the world.my love grows for you a thousand miles a minute. every day with you is the best day of my life.' How sweet!
Scott also took to Instagram to wish his little girl a happy birthday last week.