He looks handsome -- his suit might be a hair too short? -- and I actually think he is perfect casting as Thénardier. She looks miserable, but she's probably (a) freezing and (b) remaining frozen so as not to show us her nipples.
The dress itself isn't bad, but one deep breath, and the world will be able to describe her nipples to a sketch artist.

From this angle, the detailing on the bodice -- and the skimpy cut -- makes her look like she's wearing a sea-shell bra. Add in the red hair, and we're about two minutes from her swimming down to her storage cave to show us her gadgets aplenty, her woozits and whatsits galore.