Alicia Vikander

Alicia Vikander in Proenza Schouler at a photocall for Jason Bourne in Madrid, Spain, July 2016. Photo by Getty Images.

Who: Alicia Vikander.

When: Wednesday, July 13.

Where: A photocall for Jason Bourne in Madrid, Spain.

What: A black off-the-shoulder Proenza Schouler Spring 2016 minidress with black sandals.

Why: As with her Céline look for the South Korea Jason Bourne press conference, the success of this look is in its carefree ease. The tie-front embellishment anchored the Proenza Schouler Spring 2016 collection, and here as on the runway, it's left undone, giving the look a nonchalant elegance. The contrast of the bare, off-the-shoulders top and the long sleeves below just clinch the design as our best dressed of the day. Sure, Louis Vuitton looks good on her, but so does everything else.

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See Alicia Vikander audition for Humphrey Bogart's role in Casablanca, here: