by Jessie Rosen | Wed., Feb. 20, 2013 12:05 PM
Michelle Williams has us style stumped.
The Oz the Great and Powerful actress arrived for her Late Night with David Letterman appearance in what is either a very short coat or a very formal mini dress. We hear that this is a version of the Christian Dior double-breasted tuxedo dress that was debuted on the runway recently, but Michelle's choice of long-sleeved navy wool really blurs the line between outerwear and formal wear.
Bottom line, with legs like those, the former My Week With Marilyn star can call it whatever she wants.