“Demi Moore still knows how to steal the spotlight at Cannes.” Photographs. 👇

She saved the most dazzling look for last.

For the opening ceremony, Moore stepped onto the red carpet in a custom Jacquemus gown featuring pearlescent sequins, a peplum waist, and paneling running down a mermaid skirt.

A show-stopping five-tier diamond necklace from Chopard, plus rings and floral-shaped earrings, completed the look.

Demi Moore at the opening ceremony of the 79th annual Cannes Film Festival on May 12, 2026 in Cannes, France | Source: Getty Images
Demi Moore at the opening ceremony of the 79th annual Cannes Film Festival on May 12, 2026 in Cannes, France | Source: Getty Images

Actress Rita Wilson praised the gown in the comments, writing:

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“Maybe one of my most favorites dresses on you[sic].”

The One Detail Everyone Couldn’t Stop Talking About
It was Moore’s noticeably slender appearance — particularly her arms — that soon became a major topic of conversation online.

Demi Moore at Palais des Festivals on May 12, 2026 in Cannes, France | Source: Getty Images
Demi Moore at Palais des Festivals on May 12, 2026 in Cannes, France | Source: Getty Images

As photos from both the photocall and opening ceremony spread across social media, many viewers began zeroing in on how slim her arms appeared in the strapless Jacquemus gown.

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The images quickly fueled broader conversations about Hollywood beauty standards, aging, and the intense scrutiny female celebrities continue to face online.

Demi Moore attends the opening ceremony and “La Vénus Electrique” (The Electric Venus) screening on May 12, 2026 in Cannes, France | Source: Getty Images
Demi Moore attends the opening ceremony and “La Vénus Electrique” (The Electric Venus) screening on May 12, 2026 in Cannes, France | Source: Getty Images

‘Beautiful’ or ‘Doesn’t Even Look Like Her’: Fans Take Sides
It didn’t take long for social media to erupt with reactions. “Demi Moore still knows how to steal the spotlight at Cannes.” one fan wrote. “Doesn’t even look like her,” another commented. Supporters pushed back immediately. “She is muscular! Wish I were as fit!” one wrote.