"Glass Onion"'s Costume Designer Breaks Down Madelyn Cline's Festival-Girl Outfits

Most of Whiskey's outfits are straight off the rack, but Eagan and her team took time to augment each piece. On Cline's Cult Gaia dress, they added elastic to the dip at the base of the back cutout. The practical alteration made the piece more comfortable to move in.

Copious amounts of broken glass in certain scenes made it impossible for the actor to go barefoot (see: her Sam Edelman wrap sandals). The delicate jewelry and effortless styling, though, make it seem like she's barefoot as she drifts between throwing back cocktails and running for her life.

During one of the film's most climactic scenes, Blanc points out that Whiskey is a Taurus. As the camera pans to Cline, we see her wearing the Cult Gaia Serita dress and a custom zodiac necklace from Crowe Jewelry. The necklace is a small but crucial detail that ultimately helps Blanc nail down a culprit.

While Cline's necklace is bespoke, most of her accessories are a pastiche of pieces sourced in the US and Greece: Jennifer Fisher hoops and rings plucked from mall kiosks, vintage Maya Jewelry embedded with turquoise stones, and a chic body chain.

Cult Gaia Serita Dress in Amber ($275)

L*Space Stina Midi Dress in Coffee ($150)

Remi x Revolve Hannah Maxi Dress in Chocolate ($75, originally $135)

One of Whiskey's most memorable fashion moments occurs when she's lounging poolside with Miles and Blanc. As the group's youngest member, she's in on every style trend. Showcasing Whiskey's sartorial savvy, the costume designer dressed Cline in an elegant gold bikini and a Norma Kamali sarong. Like Cline's metallic ensemble, the entire cast's swimsuits have a story worth telling.

ASOS Design Curve Mix & Match Bikini in Gold Glitter ($52)

Baobab Ola Top in Glossy Gold ($70, originally $100)

Norma Kamali Kamali Kulture Sarong in Ivory ($38)

Summersalt The Easy Breezy Voile Sarong ($75)

Balancing out Birdie's peacock gowns and Andi's vibrant wrap dresses, Whiskey's color palette is noticeably neutral. "Most people [in 'Glass Onion'] are a little bit more dressed up than they normally would be, but I just thought it was really fun, the glamour," Eagan says. "I just love the glamour."

When she first meets up with Duke's crew, Whiskey is wearing an all-white ensemble. Upon closer inspection, the outfit is a Toluca crop top from Italian brand Temptation Positano paired with cream denim shorts from Zara. Eagan styled the look with a See by Chloé fringe purse and recycled fringe boots from Donald Pliner.

"I think they're just so fun and they just pair with anything," Eagan says of Whiskey's boots. "You could put on a skirt, you could put on some jean shorts, and it just picks it up a little bit. [They have] that little bit of an edge to them."

The assortment of international pieces adds a worldliness to Whiskey's character. Her carefree spirit and desire to stay on trend make her difficult to ignore in any scene. But Eagan's favorite part about Whiskey's wardrobe is the balance between flair and accessibility. She adds, "It's very achievable for anyone."

Toluca Top by Temptation Positano ($196)

Zara Ripped High-Rise Denim Shorts ($10, originally $40)

Old Navy High-Waisted OG Straight White Cuffed Jean Shorts ($12, originally $35)

Camila Coelho Carrie Top in White ($107, originally $178)

Iisla & Bird Plus Tie-Front Beach Romper in Cream ($43)

Jeffrey Campbell Cattle Boot in Beige Suede ($335)

Roper Fringe Riding Boot ($64-$88)

Minnetonka Fringe Boot ($115)

Callista Small Fringed Suede Crossbody Handbag ($360)

Rarityus Faux Suede Fringe Crossbody Bag ($24)