It's in the jeans: Gigi Hadid's denim-themed birthday bash featured a star-studded guest list

For her 24th birthday denim party, Gigi Hadid wore a white crop top paired with a jean jacket and jeans that were subtly stamped with a number 24.

Gigi's younger sister Bella Hadid wore a jean jacket, jeans, and a denim bustier.

Gigi and Bella's mother Yolanda Hadid arrived to the festivities wearing a dark denim three piece suit with her hair slicked back in a ponytail.

Ashley Graham wore a belted denim dress paired with black thigh high boots. 

Danish supermodel Helena Christensen wore high waisted jeans with a sultry black lace bustier. 

Actress Hailee Steinfeld paired a button up denim shirt with a black blazer and matching black boots.

Olivia Culpo was shining with her oversized denim dress and sparkly boots. Also, peep her blinged out choker. 

Taylor Swift shied away from the denim theme and opted to instead wear a floral dress under a red gingham jacket.

Former Victoria's Secret Angel Martha Hunt kept it simple and chic with a white top, dark jeans and brown knee high leather boots.

Newlywed Marc Jacobs arrived at the party looking dapper in a leopard print coat with husband Char Defrancesco.