The dress-over-pants trend is all grown up, thanks to Elle Fanning. At the Sentimental Value screening at the London Film Festival on Saturday, Fanning revived the early aughts styling trick in a way that felt fit for the modern day.

Fanning, who stars as an American actor in director Joachim Trier’s new film, slipped into a party-worthy sequin frock from Irish designer Simone Rocha’s spring 2026 collection. The piece featured a scoop neckline, functional pockets, and a drop waist silhouette that sat loosely on Fanning’s figure. Its calf-length cut was long enough to conceivably wear on its own. But Fanning, working with her long-time stylist Samantha McMillen, put on a pair of decidedly baggy trousers underneath.

Due to her dress’s formal length, only a sliver of the actor’s trousers

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