Helen Mirren Dazzles at Cannes Film Festival Wearing Massive Necklace with Gemstones Totaling Over 400 Carats

Helen Mirren just delivered one of the most memorable jewelry moments at the 2025 Cannes Film Festival — if not of all time. On May 22, the Oscar winner, 79, attended the Colors of Time premiere wearing a jaw-dropping Margot McKinney necklace called the Marina Collier. The centerpiece of the accessory is a string of gemstones that altogether weigh over 400 carats. In the middle lies a 241-carat cushion-cut green beryl followed by a more oval-shaped 109.48-carat one in addition to a 65.72 aquamarine stone.

Helen Mirren in Margot McKinney’s Marina collar.

Vittorio Zunino Celotto/Getty

Each one is surrounded by a stunning arrangements of green beryl, aquamarine, tourmaline, sapphire, diamond, paraibas and tsavorite (green garnet), on 18K gold. Also completing the necklace are 29 rare baroque pearls sourced over the years from the Australian South Sea.

According to a press release, the Marina was inspired by the Great Barrier Reef and the Coral Sea. It originally debuted at the 2025 TEFAF Maastrich fair, which showcases fine art, antiques, and design, in the Netherlands. Pricing is available upon request.

Mirren, who is at Cannes as a L’Oréal Paris ambassador, piled on even more accessories with a statement-making headpiece topped with a floral appliqué. as well as large drop earrings adorned with pearls.

Her ensemble also featured a black floor-length gown with exaggerated shoulders and a turquoise bow belt extending into a floor-grazing sash.

Cannes is often the place where attendees show up and show out in their best-dressed, but Mirren is one of those stars who takes her glam to the next level.

Over the years, the 1923 star has not only experimented with her fashion but also with her beauty looks.

On a few occasions, Mirren has dyed her famous silver locks bold hues, including the time she went cotton candy pink for the 2019 Best Years of a Life premiere with Andie MacDowell and when she switched up her look with cool monochromatic blue updo for 2023’s opening ceremony. She also embraced her grays on the red carpet in 2022 with a lengthy hairstyle courtesy of icy platinum blonde extensions blended into her silver strands.

In 2024, Mirren opened up to PEOPLE about embracing her individuality. In an interview, she proclaimed that she doesn’t fall into the category of “beautiful people in the world.” But, “We are all individuals and we all have our own individuality. And I think ultimately it’s just embracing that and allowing yourself to be what you are,” she said.

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