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Less is more is the summer dress code.

Paris Hilton, Nikki Reed, and Rachel Zoe adhered perfectly to this idea while attending the stylist's Summer 2019 Box Of Style launch in Beverly Hills on Tuesday. 

The ladies shed the layers and worked their warm weather best while showing their support for Rachel's latest endeavor, held at the The Peninsula Beverly Hills. 

Summer dress code! Paris Hilton, Nikki Reed, and Rachel Zoe adhered perfectly to this idea while attending the stylist's Summer 2019 Box Of Style launch in Beverly Hills on Tuesday

Paris, 38, was a vision in a metallic Rachel Zoe maxi dress that showcased her long legs to perfection.

Wearing a gold laurel wreath atop her wavy blonde locks, the heiress was the picture of fashion royalty while posing up a storm at the stylish event. 

The socialite brought the dazzle with a gold bracelet, and delicate, glittering finger-less gloves .

Nikki exuded summer glam in an off-the-shoulder white ruffled top teamed with an emerald green maxi skirt. 

Giving them a twirl! Hilton had some fun posing up a storm in her summery maxi 

Fashion royalty: Hilton dressed up the look with a gold laurel wreath atop her cascading waves

Say cheese! Hilton flashed a brilliant smile, and looked absolutely magnificent with her face perfectly polished up 

Making a splash! The ladies showed off their eye for style while sharing a poolside photo op  

Styling her brunette locks across her head into romantic waves, the Twilight actress brought beachy vibes to the Beverly Hills event. 

The actress, who has been married to Ian Somerhalder since 2015, finished off the simple yet chic look with a gold cage inspired hand bag.

Hostess Rachel Zoe channeled her inner goddess in an off-the-shoulder lilac dress with a gilded pattern of leaves. 

Having a blast: Joey Maalouf kept it casual in white as he struck a pose alongside Zoe and Hilton

Just the girls! Zoe wrapped her arms around the ever-stylish Reed 

Pretty in pink! Jamie-Lynn Sigler worked a fabulous off-the-shoulder fuchsia maxi dress

Striking in silver: Stassi Schroeder and Racquel Natasha rocked the bash in their metallic best 

Glamour girl: Stassi cut a stylish figure in a busty silver suit as she arrived for the star-studded launch

Playful: Racquel Natasha and Jessi Malay shared a giggle as they arrived at the launch event

The fashion icon put her styling chops on full display, and looked absolutely amazing with her blonde styled into mermaid-esque waves. 

Among the star-studded guest list also bringing the fun and festive fashion was actress Jamie-Lynn Sigler. 

The former Sopranos star dazzled in an off-the-shoulder fuchsia maxi dress, glammed up with gold hoop earrings, a matching watch, and chic high ponytail. 

Back in black! In a departure from the colorful styles, Molly Sims and Soleil Moon Frye opted for all-black 

Hello petal! Vanessa Lachey worked a white ruffled dress with straw handbag 

Dressed to impress: Anne Winters oozed boho chic in a loose white frilled dress with a floral crochet overlay

Three's company! Zoe enjoyed a moment with Soleil and Sigler 

Suits her! Loren Gray cut a stylish figure in a black pantsuit 

Sensational: As Rachel also posed with Paris, the pair made for a stylish image at the event together

Say cheese! The selfie-snapping was rife throughout the fashion showcase

Vanderpump Rules star Stassi Schroeder meant business in a glittering silver suit paired with sophisticated black leather hand bag. 

Molly Sims opted to stand out in a plunging black lace dress with ruffled sleeves.

The model radiated with her blonde locks pulled back into a chic ponytail, and an array of gold jewelry to dress up the beachy look. 

Vanessa Lachey was the picture of picnic sophistication in a pretty floral print dress with strappy heels and straw purse. 

Rachel's Box Of Style is a subscription-based service that deliveries seasonal styles every quarter to members. 

Girl talk! Zoe soaked up the sunshine alongside Anine Bing, Candace Nelson, Lizzie Mathis, and Vanessa

Spreading the love: The ladies had a blast blowing kisses 

Jean-ius! Tori Praver enjoyed the day in a statement-making denim dress

Picture perfect! Zoe appeared to be taking a picture of the ladies 

For the Instagram? Lachey shared a snap with the hostess