The luxury jewelry brand Tiffany & Co. brought out the biggest stars for its annual Blue Book collection launch in New York City. The event, held at the Park Avenue Armory on April 16, 2026, celebrated the new Blue Book 2026: Hidden Garden collection. A-listers from movies, music, and fashion walked the blue carpet wearing stunning gowns and rare diamonds. The dress code was clear—black, white, and bold jewelry took center stage as celebrities showed off their best looks for the night.
Diane Kruger Brings Garden Fantasy to the Red Carpet
Diane Kruger was one of the most talked-about stars of the evening. She wore a custom Sabina Bilenko gown that matched the Hidden Garden theme perfectly. The dress had a strapless corset top with detailed embroidery showing peacocks, vines, and flowers. The skirt flowed in soft seafoam green tiers, giving the whole look a fairy-tale feeling.
Kruger kept her hair in a tight bun and wore icy diamond jewelry from Tiffany. Fashion critics loved how the dress worked with the jewels instead of competing against it. The soft blue-green colors of the gown also matched the famous Tiffany Blue box color.
Greta Lee Chooses Simple and Strong Black-and-White Look
Greta Lee proved that simple can still steal the show. She arrived in a Marc Jacobs outfit that was all about clean lines and sharp shapes. Lee wore a sequined bandeau top with a fitted black column skirt. The look was very controlled and modern, with nothing extra to distract the eye.
What made her outfit work was the bright green statement necklace she added. The vivid color popped against the black and white outfit. Lee kept her hair smooth and wore pointed heels. Her makeup was also very light and natural. This look followed the event’s unspoken rule—let the jewelry speak first.
Amanda Seyfried Shines in Silver Embellished Mini Dress
Amanda Seyfried brought the glitz in a long-sleeved silver mini dress. The dress was sheer and covered in sparkling embellishments that caught every camera flash. She wore her hair in soft waves and added delicate heels that did not take attention away from the dress.
The Oscar de la Renta dress was short but had long sleeves, creating a nice balance between covered and revealing. Seyfried sat next to Gabrielle Union during the event and was seen chatting with other stars. Her look was classic Old Hollywood glam but with a modern, shorter hemline. The silver color of her dress worked as a neutral backdrop, letting her Tiffany diamonds stand out without any color clash.
Diego Boneta Brings Back Brown in Sharp Tailored Suit
Diego Boneta was one of the few men on the best-dressed list, and he earned his spot. He wore a chocolate brown suit that was perfectly tailored to his body. The brown color was a bold choice because most guests wore black or white. Boneta paired the suit with a tonal shirt in a similar brown shade.
He added a small brooch to his lapel for a touch of sparkle. The whole look felt fresh and modern. Fashion watchers noted that brown suits are not common on red carpets, but Boneta made the case for bringing the color back. His outfit proved that men could also follow the jewelry-first rule by keeping his accessories minimal and letting the brooch do the talking.
Chase Sui Wonders Goes Soft and Romantic in Pink
Chase Sui Wonders chose a very different path from the black-and-white crowd. She wore a soft pink dress made of sheer, layered fabric that created a balloon-like shape. The dress looked almost weightless, as if it could float away. The pale blush tone of the gown was a perfect match for the delicate diamond jewelry she wore from Tiffany.
She finished the look with short pink heels that matched the dress. The entire outfit felt romantic and dreamy, like something from a garden wedding. While most guests stuck to dark or neutral colors, Wonders proved that pastels could also work if done correctly. Her dress did not compete with her diamonds because the soft color and sheer fabric let the jewels shine through.
Other Celebrities Who Impressed at the Tiffany Event
The best-dressed list could have been much longer. Rosé from BLACKPINK wore an ivory gown from Khaite with black ribbon and lace details. Rosie Huntington-Whiteley chose a strapless white dress that showed off her toned arms. Teyana Taylor wore a dramatic feather coat in dark tones with diamond jewelry.
Mariah Carey performed at the event and wore two different outfits. She started in a white fitted off-the-shoulder gown with a gold belt. Later, she changed into a black strapless gown with a cropped leather jacket. Naomi Watts stood out in a sequined skirt while Valentina Ferrer showed off her legs in a brown dress with a thigh-high slit.
Gabrielle Union and her husband Dwyane Wade matched in all-black outfits. Union wore a strapless dress with statement jewelry while Wade kept his look classic. Connor Storrie was seen talking with Rosé and Rosie Huntington-Whiteley during the event. Lucky Blue Smith and his wife Nara Smith also attended, along with Song Yuqi, Masami Nagasawa, and Matilda De Angelis.
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The Hidden Garden Collection That Inspired the Looks
The Blue Book 2026: Hidden Garden collection is the fourth Blue Book created under Nathalie Verdeille, Tiffany & Co. ‘s Chief Artistic Officer. The collection draws ideas from the work of Jean Schlumberger, a famous designer who worked with Tiffany starting in the 1950s.
The collection has 78 special pieces divided into 11 themes. These include Butterfly, Monarch, Bird on a Rock, Paradise Bird, Parrot, Bee, Jasmine, Marguerite, Bloom, Twim Bud, and Palm. Some pieces use paillonné enamel, a technique Schlumberger used in the 1960s and 1970s. One of the most expensive pieces is a necklace with a nearly 19-carat D Flawless diamond, described as the purest you can find.
The collection will come out in three parts—spring, summer, and fall. The spring launch happened at the New York event on April 16. Anthony Ledru, the CEO of Tiffany & Co. , said the collection honors Schlumberger’s legacy while updating it for today’s customers.
Fashion Rules of the Night: Black, White, and Letting Jewelry Lead
The red carpet at the Tiffany event followed three clear rules. First, almost everyone wore black or white. This created a clean background so the diamonds and gemstones could stand out. There were no bright colors or busy patterns to cause visual noise.
Second, statement necklines were everywhere. Strapless gowns dominated because they give the best frame for a diamond necklace. The jewelry did not just complete the outfit—it decided the outfit. Designers built dresses around specific pieces of jewelry.
Third, jewelry-first dressing was the norm. This means starting with a necklace or earrings and then choosing clothes that support those pieces. The color, neckline, and fabric all work to show off the jewels. This approach turns the red carpet into a live showcase for the brand’s products.
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