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Abby O’Sullivan is a costume designer working across independent film and studio productions. Her work spans iconic genre films such as Sinister and Dark Harvest, alongside the Sundance Grand Jury Prize–winning and Academy Award–nominated Frozen River, and continues with several Sundance selections including Mississippi Grind.
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She has designed for studios including A24, MGM, Amazon, and the BBC. A dual citizen of the U.S. and Ireland (EU), Abby works throughout Europe and the United States.
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