Heidi Klum's Strapless Mermaid-Coded Gown Puts a Sparkling Spin on This Delicious Spring Color Trend

Hannah MalachThu, May 14, 2026 at 11:02 PM UTC

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Heidi Klum during the 2026 Cannes Film Festival on May 13.
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Heidi Klum attended an event hosted by Magnum during the 2026 Cannes Film Festival on May 14.

She wore a sparkling pistachio green gown featuring a strapless silhouette.

Klum was accompanied by her 20-year-old son Henry Samuel.

Heidi Klum is giving the pistachio green color trend a radiant upgrade. On May 14, the supermodel stepped out during the Cannes Film Festival in a sparkling strapless gown.

Klum's dress was studded with crystals, which, from afar, resembled the scales on a mermaid's tail. She styled the form-fitting number with a pair of open-toe stilettos featuring an iridescent oil-slick finish. Diamond-encrusted earrings, as well as a smattering of rings, rounded out Klum's look.

Heidi Klum during the 2026 Cannes Film Festival on May 14.
Credit: Getty Images

The Project Runway host attended an event hosted by the ice cream brand Magnum, where she treated herself to a chocolate-coated pistachio popsicle. Klum was accompanied by her son Henry Samuel, who wore an equally striking sheer top trimmed with gigantic ruffles.

Last month, Klum's second-eldest child prevented her from suffering a major wardrobe malfunction at the opening of LACMA's David Geffen Galleries. On April 16, she attended the Los Angeles event in a sheer knit dress covered in sequins.

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Henry Samuel and Heidi Klum during the 2026 Cannes Film Festival on May 14.
Credit: Getty Images

In a video uploaded to People's TikTok account, Samuel jumped into action after one of Klum's open-toe pumps got caught in her skirt. He successfully untangled the netted material from his mom's stiletto heel before they posed for photos together.

Klum paired her brown halter-neck dress with a matching fluffy jacket from Ducie, wearing it off-the-shoulder. Her long blonde tresses were styled in bouncy waves, while her glam consisted of a smokey eye, coral blush, and a nude lip.

Henry Samuel and Heidi Klum attend LACMA's opening gala for the David Geffen Galleries in Los Angeles on April 16, 2026.
Credit: Getty Images

As for Samuel, he sported a black suit featuring satin trim and an unexpected zipper detail. He added on a pendant necklace, derby shoes, and a scoop-neck tank top, topping off his ensemble with some sleek sunglasses.

Samuel, 20, is Klum's eldest child with her ex-husband Seal. She and the singer, who divorced in 2014, also share a 19-year-old son, Johan Samuel, and a 16-year-old daughter named Lou Samuel. Klum has another daughter, 21-year-old Leni Klum, from her relationship with Flavio Briatore.

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