Olivia Wilde and her hair stylist Ben Skervin chose to pair wavy, undone tresses with her white, midriff-baring Calvin Klein gown. Ben, who used Vidal Sassoon Pro Series products to craft the look, shares instructions on how you can repeat the style yourself.

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• Work Vidal Sassoon Pro Series Boost & Lift Foaming Air Mousse througout wet hair to create texture and volume. Then, run fingers through hair for a rough dry.

• Around the front hair line and foreheard, use a round brush to blow dry sections straight to offer softness around the face.

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• Once hair is dry, wrap one-inch sections of hair down the barrel of a curling iron in a spiral, holding for only 4-5 seconds each, creating slight waves.

• After you've worked through your entire head with waves, allow hair to cool.

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• Mist texturizing spray into hair roots to give a beachy, undone texture.

• Brush strands out and set hair using Vidal Sassoon Pro Series Flexible Hold Hairspray to hold waves in place.

When you're headed to a big event, do you prefer lengthy locks like Olivia's or a crisp updo? Tell us in the comments below or tweet @OKMagazine.