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CANNES, FRANCE - MAY 23: Actress Sienna Miller and Director Xavier Dolan attend the Premiere of 'Macbeth' during the 68th annual Cannes Film Festival on May 23, 2015 in Cannes, France. (Photo by Clemens Bilan/Getty Images for Kering)

CANNES, FRANCE - MAY 23:  Actress Sienna Miller  and Director Xavier Dolan attend the Premiere of 'Macbeth' during the 68th annual Cannes Film Festival on May 23, 2015 in Cannes, France.  (Photo by Clemens Bilan/Getty Images for Kering)