For a movie, is why.
We don't know too much about the film yet, but this new bathrobe scene seems like it is in stark contrast with her wardrobe from last month's shoot, so who knows how this movie could play out!
We hope Anne is enjoying her time working on the film in New York, because we know that she's at least having fun spending her time messing with paparazzi.
The comedy isn't due to hit theaters until September 2015, but if the movie promises both Anne AND Robert in nothing but robes, we might just have to mark it on our calendars already.
[Image via Luis Jr Rodrigo/Ramey Pix]