This is really great! I loved Mal in the movie and my headcanon is that she's like best friend forever with Arthur. And I believe she looks exactly like this when she's entering a room and everybody has to stop for a moment and just watch her being beautiful.
I adore Marion Cotillard (she's probably my second favorite French actress), but I gotta admit, that wasn't her best film. Ah, well, you drew her beautifully anyway.