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. Yes, that's right - guests had to walk into Stormi's mouth to enter the party.
Scott, 26, partied alongside Kylie and Stormi throughout the celebration, and the birthday girl's aunts Kourtney Kardashian and Khloé Kardashian both brought their children to the festivities.
The 43-year-old opened the baby's present for her and revealed an adorable Chanel bag.
With the SICKOMODE rapper snuggled into her neck, Kylie, 21, gently held onto his hand making for one of the cutest couples of the night.
Listen to episode 12 of The Gossccast where we chat to Jenny Dixon about following her Hollywood dream and her Fair City journey.
Ariana Grande Slammed Grammy Producers for 'Stifling' her Creativity
She's the first female pop artist to do so and there's talk of other female artists who will soon follow her lead. If viewers look closely, they'll see copies of Grande's tattoos on her neck and hand.
Keeping on theme, Stormi's birthday cake was also colourful and featured several elaborate layers that culminated with a mini carousel on top and a pic of Stormi with her famous mum.
Though there was a small party on Stormi's actual birthday, February 1, Jenner, 21, revealed at the time that the planned festivities had been postponed due to rain.
Showing support for her granddaughter, Caitlyn Jenner attended the festivities alongside Sophia Hutchins.
How much did Kylie Jenner spend on Stormi's birthday party?
"I think she was just like, 'We are looking good, and we're really into each other, and maybe baby number two is going to happen, '" Kendall said.