Jennifer Aniston's hairstylist, Chris McMillan, wanted somewhat casual hair. "The key word is natural," he said. "Jen's Valentino gown was such a daring fashion choice, so we wanted her hair to make her feel comfortable." To start, Chris used Living Proof Prime Style Extender ($20) for a touchable finish. After blow-drying hair with a round brush, he then used hair spray on the roots for height.