Cannes 2015: Sienna Miller in Valentino Couture

Sienna Miller attends the premiere of “The Sea of Trees” during the 2015 Cannes Film Festival in Cannes, France in a Valentino couture gown from the Spring 2015 collection. Valentino Spring 2015 Couture Collection Photo Credit: Getty Images, CHP/FAMEFLYNET PICTURES, IMAXTree