Kourtney, Kim and Khloé Kardashian, and Caitlyn and Kendall Jenner were all on hand to ring in the teenager's big birthday, as was Kim Kardashian's husband, Kanye West. There were plenty of gifts to be had, too.
Jenner was the lucky recipient of a luxe Hermès bag and, according video captured by TMZ, a Ferrari from rapper Tyga.
"I'm like 'hey, what's up, hello'"
"MY GIRLS. party night. #18@12"
"and it's not even my birthday yet"
"The festivities are just beginning!! My baby girl is going to be 18!!! I'm legit going to cry I love you Ky!"
"let the birthday celebrations begin! First stop: @childrensla"