Olivia Wilde Shines in Mermaid Green Halter Dress

The Don't Worry Darling director lit up the red carpet during the San Sebastian International Film Festival in Spain.

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Where the thriller premiered at the Victoria Eugenia Theatre on Sept. 17.

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For the special occasion, Olivia glimmered in a mermaid green halter dress by Valentino.

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The design, which debuted on the 2022 couture collection, molded her body with its curve-hugging material.

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However, it was when she turned around that the gown, well, truly shined.

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As it featured a plunging open-back that was cut so deeply her side-boob peeked out.

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One downside to the eye-catching number was that the floor-length train was too long for the 38-year-old.

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Who almost took a tumble while she made her way through the red carpet.

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Photos captured Olivia trying to balance herself as the dress snagged onto her sequins pumps.

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