Halloween’s over, Kylie! A rare style disaster at Kendall’s birthday bash

Sounds like someone didn't get the all-black memo.

Kendall Jenner celebrated her 20th birthday in style last night, but one of her sisters failed to impress.

Ignoring her sisters' decisions to wear all black, Kylie donned a Cleopatra look for the evening, pairing a blunt brunette wig with a pleated and draped gold jumpsuit.

The layers of fabric swamped Kylie's curves, with the flared silk bottoms dragging along the ground as she walked. The sheer-backed ensemble was topped off with a yellow waist belt.

As for the birthday girl, she kept things a little more muted in an incredible backless jumpsuit with a seriously sexy plunging neckline. 

Kendall kept her make-up sleek, going for a smoky eye and a bold red lip, wearing her long brown locks in a topknot.

The Kardashian-Jenner clan were out in force for the bash, which took place at Hollywood club The Nice Guy. Going by Kendall's cake, 'black and gold' seemed to be the theme of the evening, though Kylie was the only sister to go for the latter when it came to her choice of outfit.

Also present – and dressed all in black – were Kendall's older sister's Kourtney and Khloé, who both kept it simple with cropped jackets, form fitting outfits and heels.

And even at eight months pregnant, Kim still looked super-sleek in a glittering black bodycon dress and sequinned jacket.

Of course, it's not the first time Kylie has ignored her sisters' choice of dress code.

Indeed, at a Cosmopolitan party just three weeks ago, the teen dressed all in white while her sisters were quite clearly synched up in black.

A red carpet rebel, to be sure.