Lady Mary — or Michelle Dockery as we are supposed to call her — is out in America promoting her new movie, Non Stop. For the premier she wore this utterly gorgeous and ladylike Christian Dior dress that I love on her and can't imagine anyone else wearing.

It's cute and pretty — and sophisticated at the same time. It's got a great elegance and shine for the evening affair, but is still youthful. And her hair and happiness bring the real shine to the event.

Earlier in the day, Michelle was wearing a sassy little Cushnie et Ochs dress with that patent hem trim. Again, the swagger came from her own personal carriage and style — and the way in which she looked so happy to be there and doing this promo work. Now that's class.