Sienna Miller in Horribly Unflattering Galvan Sack Dress

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Sienna Miller came dressed in a terribly unflattering loose-fitting satin gown as she hit 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.

The mother-of-one donned a copper-colored silk dress from the Galvan Spring 2016 collection featuring a scoop-neck. She styled the vintage-inspired gown with a delicate gold chain.

Do you think Sienna looked in the mirror before leaving her hotel room?

Sienna Miller came dressed in a terribly unflattering loose-fitting satin gown as she hit the red carpet at the Kursaal Palace during the 63rd San Sebastian International Film Festival

Sienna Miller donned a copper-colored silk dress from the Galvan Spring 2016 collection featuring a scoop-neck

Tom Hiddleston, Luke Evans, and Sienna Miller at the Tom Hiddleston, Luke Evans, and Sienna Miller at the “High-Rise” premiere held the Kursaal Palace during the 2015 San Sebastian International Film Festival in Spain on September 22, 2015

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!

Credit: WENN / Sean Thorton