It's a big milestone for her and Kylie Jenner went all out for her 16th birthday, holding an Alice in Wonderland themed party at the AT&T Center in Los Angeles on Saturday (August 17).

The birthday girl herself arrived with her girlfriends in a camouflage coverall before revealing a sleeveless midriff-baring black top and black leather skirt for the festivities.

Supporting her little sister and business partner, Kendall Jenner sported a long black sleeveless dress with a slit up one side, matching high heels, and a tiny red party hat perched on her head.

Showing some half-sister love, Khloe Kardashian arrived in a black blouse and matching pants while Kourtney donned an appropriately quirky monochromatic dress with platform heels. Nearby, Scott Disick hung around in a gray suit with leopard-print shoes.

Riding high from the excitement, Kylie tweeted afterwards, "Thank u to everyone who came to my party and making my night so special HAD THE BESTTT NIGHTTT."