Kendall Jenner Turns 26: Inside Her Big Halloween Bash

Kendall Jenner celebrates her 26th birthday in style!

The supermodel turned 25 years old today, so, on Halloween, she threw a fun party with her family and friends. She took to Instagram and showed off her costume. Scroll down for the pics.

The "Keeping Up With The Kardashians" alum had the grand celebration at Harriet’s Rooftop in West Hollywood, located on top of One Hotel on Sunset Boulevard last Sunday, as per Vogue.

Kendall chose the Martian Girl from Tim Burton’s "Mars Attacks!" as her costume. Her outfit included a body-hugging dress with sleeves and a turtleneck design. In addition, the garment, made of satin, boasted a white base with red swirls all over. According to the publication, the piece of clothing was from California-based brand L.A. Roxx and Maisie Wilen.

Kendall also rocked a beehive blonde wig to complete her look. For makeup, she had blue eyeshadow, black eyeliner, pink blush, and bold red lipstick.

According to Vogue, the party was attended by several big names, including Justin Bieber, wife Hailey Bieber, Paris Hilton, Jaden Smith, Justine Skye, Winnie Harlow, Quavo, and more. Her sisters Kim Kardashian and Kylie Jenner were also present, as well as Kanye West, Scott Disick, and Travis Scott.

On Instagram, Kendall posted four stunning pictures of herself in her costume.

"Mars Attacks! happy halloweeeeeen," she captioned the post.

"Legend!!!!!!!!" her sister Khloé Kardashian commented.

"KILLLED ITTTTTTT," quipped another follower.

"Kenny this is perfect!!" noted a third commenter.

As of this writing, the share earned more than 5.8 million likes and over 14,500 comments.

Kendall made a second upload containing two snaps. This time, she captioned the share with: "nice planet, we’ll take it."

Khloé commented again, writing, "Always winning."

"The higher the hair, the closer to God. (And Mars?)" journalist Derek Blasberg wrote.

Meanwhile, a third admirer called Kendall the "Queen of halloween !!!!!❤️"

Kendall has always loved Halloween since her birthday is just a few days after. The 818 Tequila founder enjoys throwing Halloween-themed parties each year in celebration of the special holiday and her birthday. Each year, she comes up with extraordinary costumes.

Weeks before Halloween, Kendall showcased a couple of looks on her Instagram account. A few ago, she dressed as a sexy Corpse Bride, wearing nothing but a set of white undies, a long veil, and a pair of white, high-heeled shoes.

On October 30, the reality star celebrated her boyfriend Devin Booker's 25th birthday. She posted a tribute for him on her Instagram Stories, wishing the basketball star a happy birthday, as seen on a screenshot posted by Page Six.

“Happy birthday best friend @dbook,” she wrote in a picture of herself playfully sticking her tongue out while she lay on the Phoenix Suns player, who was lounging on the beach chair.