You know it when you see it—and you see it everywhere these days. Eclectic but not to the point of confusion. Neither minimalist nor maximalist (okay, sometimes rather maximalist). It's calm, cozy, and inviting. It's familiar yet fresh.
Like so many things in décor, it started in fashion. "Soft Boho" was a look—is a look, still, quite decidedly—that itself was a comeback of a look that never entirely goes away, even if it's driven underground from time to time by the changing tastes of couture. It stormed up out of the UK in the early aughts. Kate Moss. Sienna Miller. Mischa Barton. Mary-Kate and Ashley Olsen took it and ran with it (and ran, and ran, and ran, like their eyeliner). By the end of the decade, Florence and her machine delivered a beautiful, darker strain of it.
But mostly it was Sienna Miller.