See the Show-Stopping Celebrity Looks from Kendall Jenner's 21st Birthday Party

Jenner kicked off her birthday festivities with dinner at Catch restaurant in West Hollywood, California. For the occasion, the model wore a black Julien Macdonald bodysuit (that gave us major vintage Britney vibes) topped off with a moss green Charlotte Simone stole and lace-up heels.

Cinderella for the evening: Kendall changed costumes during her big night and swapped black bodysuit for this sparkling take on flapper style. She accessorized with a set of see-through sandals à la sister Kim, a L'Afshar clutch, and a silvery choker.

Baldwin's first look of the evening (for dinner at Catch) teamed a sheer navy crop top with a set of bulky patterned pants.

The 19-year-old model also celebrated her pal's birthday in a club-ready look that included fishnet-style over-the-knee Tamara Mellon boots and a corset-style off-the-shoulder Vera Wang top with Vera Wang shorts.

Kendall's eldest sister arrived at the L.A. hotspot in a shiny silver minidress with hem-lining lace overlays. 

Kendall's little sis combined the season's most risque trends in her party look. A sheer turtleneck and lace-up pants? When you're Kylie Jenner, why not? She wore a DKNY bra ($44, belk.com) under her top along with her Unravel Project ($2,098; farfetch.com) pants.

The Kar-Jenner matriarch celebrated her daughter's big day in an all-black look constructed out of a gown, an ankle-length cape, and pointed-toe boots.

The 15-year-old model appeared to channel the birthday girl in a simple, Kendall-esque look, complete with Jenner's go-to staple: a thick choker. Kenneth Cole boots added to her ensemble.

Kendall's big sister kept her look classic in a simple, sexy LBD and matching sandals. 

Caitlyn celebrated her daughter's milestone birthday in a floor-length gown with a teal embellished neckline. 

The model stole a page from Grease in her Sandy-esque off-the-shoulder crop top and leather pants. 

The 50-year-old model looked impossibly youthful in a pair of leather pants and a sparkly silver jacket. 

The Being Mary Jane star rolled up to the L.A. club in a cropped cobalt blue jacket, stylish tan shorts, and a set of white sailor's knot sandals. 

Mara gave her olive green plaid dress edge with a set of leather flats and a motorcycle jacket.