I’m not sure which Olsen this is… But does it even matter? Her hair looks cute.
According to Matthew Monzon for Kérastase, who did her hair, this is how to achieve the look:
1. Spray Kérastase Nutridefense Spray on damp hair.
2. Run quarter-size dollop of Kérastase Substance Constructive thru ends of hair. Air-dry.
3. Select varied 1- to 2-in. sections and curl around iron.
4. Finish with a drop of Kérastase Nutri-Sculpt.