Jessica Chastain in Saint Laurent

At the very least, this passes the "Do You Want to Twirl Around In It?" test.

Jessica Chastain in Saint Laurent

This back detailing is very intriguing. I think I like it? It sort of the rear view of a very fancy pageant sash and yet it seems to work.

Jessica Chastain in Saint Laurent

I wonder if maybe it's a little bit PLEATS EVERYWHERE PLEATS AHOY, but overall, I do think this is pretty on her. What do you think? LET'S DISCUSS.

Jessica Chastain

Definitely not tights. Thank goodness?

Mostly Well Played, Jessica Chastain in Saint Laurent

I mean, I have SOME notes? But they're minor. All this, plus an UPDATE on the last dress in which we saw her (short version: at least they weren't lace tights). [Photos: Getty, Fame/Flynet]