See the Fabulous Arrivals to Kendall Jenner's Birthday Parties

The birthday girl pulled out all the stops to ring in the big 2-1. Her first appearance of the night was at Catch LA in West Hollywood, California, turning up in a body-hugging, lace-up halter catsuit that featured sheer, paneled legs. She paired the look with an olive green Charlotte Simone fur scarf and strappy heels.

The sisters arrived arm-in-arm wearing two very different minis. Kourtney sported a metallic cami with black lace detailing and lace-up pumps, while Khloe's long-sleeved LBD featured a high neckline covered in chains, which she paired with a gold clutch and black, wavy strapped sandals.

The 19-year-old model stuck by her pal's side all night. For their first stop at Catch LA, Hailey sported a sheer navy blue crop top with matching pants and a thick choker, finishing off her look with loose waves and a bronze smoky eye.

The momager wore a cape and sequins to her daughter's birthday bash, because Of. Course. She. Did.

It's MJ! Kendall's grandmother looked downright regal in an all-white ensemble topped with a fur coat, which she paired with a fabulous patchwork Chanel purse, long pearl necklaces and silver bow heels.

He may be Kourtney's ex, but Scott is still part of the Kardashian family! The dad of three sported a casual-cool dark ensemble, consisting of a hoodie, denim jacket, jeans, and sneakers, to Kendall's first fête.

Why rock one killer outfit when you can wear two? For her second birthday stop at Delilah's, the in-demand model channeled Paris Hilton's 21st birthday in a very low-cut sequined silver dress and wraparound necklace.

The youngest Kardashian-Jenner sibling was clearly ready to party! Despite being covered up, Kylie still managed to show skin in a club-worthy long-sleeved turtleneck mesh top, exposed bra, and lace-up leather pants.

Kendall's BFF also made a quick change for Delilah's, swapping into an off-the-shoulder sheer top, black shorts, and thigh-high mesh boots.

The stunning family made the entrance to Delilah's their catwalk! Kaia was as on-trend as always in a gray crop top and black pull-tie mini, which she paired with a ribbon choker, layers of gold necklaces, and black patent booties, while Cindy stunned in a silver blazer and leather pants, and Presley repped his dad's company, Casamigos Tequila. 

The Olympic gold medalist wore a classy gem-encrusted column dress and black cardigan to Delilah's.

Crop tops were the name of the game at Kendall's soiree, and Aiko wasn't an exception to the rule. The R&B singer paired an itty bitty forest green top with a dusty rose kimono and silky cerulean flares, while her rapper beau went far more casual in a dip-dye hoodie, red jacket, and ripped jeans.