Before we ever saw Marion Cotillard's dress, we already knew it'd be Dior Couture. The face of Lady Dior, the Oscar-nominated star has been wearing Christian Dior to nearly every red carpet during awards season. But we were certain Marion — known for taking style risks at nearly every turn — would still surprise us in something very fashion forward. But when she showed up in a simple, albeit gorgeous, white eyelet dress with train, we were a tad disappointed . . . until she turned around and showed off the most interesting back of a gown we've seen in a long time. Did it hit the mark?