Sienna Miller’s Unflattering Satin Gown at the 63rd San Sebastian Film Festival

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Sienna Miller opted for a loose-fitting satin gown that missed the mark as she graced the red carpet at the Kursaal Palace during the 63rd San Sebastian International Film Festival for the premiere of “High-Rise” in San Sebastian, Spain, on Tuesday evening.

Sienna Miller styled her look with a sleek, pulled-back hairstyle and a bold red lip, accentuating her natural glow with minimal makeupSienna Miller styled her look with a sleek, pulled-back hairstyle and a bold red lip, accentuating her natural glow with minimal makeup (Credit: WENN / Sean Thorton)

The mother-of-one chose a copper-colored silk dress from the Galvan Spring 2016 collection with a scoop neck. She completed the vintage-inspired look with a delicate gold chain.

Sienna Miller graced the red carpet in a copper-hued satin gown from the Galvan Spring 2016 collection, featuring a scoop-neck and a flowing silhouette, complemented by a delicate gold chain and metallic heelsSienna Miller graced the red carpet in a copper-hued satin gown from the Galvan Spring 2016 collection, featuring a scoop-neck and a flowing silhouette, complemented by a delicate gold chain and metallic heels (Credit: WENN / Sean Thorton)

Do you think Sienna took a second glance in the mirror before stepping out?

Tom Hiddleston, Luke Evans, and Sienna Miller at the "High-Rise" premiere held at the Kursaal PalaceTom Hiddleston, Luke Evans, and Sienna Miller at the “High-Rise” premiere held at the Kursaal Palace during the 2015 San Sebastian International Film Festival in Spain on September 22, 2015 (Credit: WENN / Sean Thorton)

Earlier the same day, she attended a promotional event for the same movie in a much nicer dress and a pair of Paul Andrew pumps!