Loose curls, not tight ringlets, give this style a romantic but grown-up edge. “Rough-dry hair so it has more volume,” says Olivia Wilde’s stylist, David Babaii. Spritz with a texturizer like IT&LY Pure TextureSpray, then twist each section around the outside of the curling iron, not using the clamp. “The key to making the curls look natural is alternating the direction you wrap every other piece around the curling iron,” says Babii. Apply a light layer of hairspray so the curls will stay in place but look touchable.