Léa Seydoux in Louis Vuitton at the photocall for It's Only the End of the World at the Cannes Film Festival in Cannes, France, May 2016. Photo by Getty Images.
Léa Seydoux in Louis Vuitton at the photocall for It's Only the End of the World at the Cannes Film Festival in Cannes, France, May 2016. Photo by Getty Images.

Who: Léa Seydoux.

When: Thursday, May 19.

Where: The photocall for It's Only the End of the World at the Cannes Film Festival.

What: A cropped sweater and skirt from Louis Vuitton's Pre-Fall 2016 collection.

Why: This is the look to emulate as spring turns to summer — there's nothing better than a bit of cozy-chic as Memorial Day approaches, and Seydoux nails it by pairing the monochromatic look (and on-trend blonde, beachy waves) with bright red heels and a matching lip.