Hayden Panettiere's casual, curly 'do is super simple to reproduce on a variety of hair lengths. Begin by curling one-inch sections with a medium-barreled curling iron, or a larger curling iron for longer tresses. After hair is sufficiently curly, mist with a product like Sachajuan Ocean Mist to create more texture, then tousle tresses thoroughly. Next, make a side or center part and pull strands along the front hairline behind the ears and secure with bobby pins.