Twenty-one-year-old actress Sasha Lane was completely untested on screen when director Andrea Arnold recruited her for her breakout Cannes hit American Honey. But since the film premiered in France in May, winning the festival's Jury Prize in the process, Lane has become its most visible star, outshining costars Shia Labeouf and Riley Keough on screen — and sometimes even on the red carpet. The same free-spirited attitude that earned her the American Honey role seems to also have brought designers clambering to recruit her to their front rows and to represent them on the red carpet; she flew out for an appearance front-row at Louis Vuitton's Spring 2017 show in Paris this month, and Nicolas Ghesquière has outfitted her for premieres and photo opps throughout the American Honey press tour. But she's also an excellent avatar for another brand, this one from the far side of the Atlantic: Lazaro Hernandez and Jack McCollough's Proenza Schouler.

Sasha Lane in Proenza Schouler at a screening of American Honey at the BFI London Film Festival in London, England, October 2016.

Getty Images for BFI

Who: Sasha Lane.

When: Friday, October 7.

Where: A special screening of American Honey at the British Film Institute's London Film Festival in London, England.

What: A long-sleeved knit dress by Proenza Schouler with an open back and a grommet and lace-up detail along the waist and sleeves, paired with black sandals and oversized dangling hoop earrings.

Why: Louis Vuitton might have been her sole front-row gig this fashion week, but Sasha Lane has clearly had one eye on the runway. (Or, at least, her stylist has.) For the latest American Honey event, Lane wore a slinky Proenza Schouler gown with an edgy lace-up cutout design. It's strikingly in line with the (predominantly Louis Vuitton) looks she's worn so far while promoting her first film; she might be a newcomer to the Hollywood scene, but Sasha Lane has sprung into the limelight with a personal style all her own.