Emily Blunt's sleek Hollywood curls for The Devil Wears Prada 2 London premiere were crafted with precision and polish. According to celebrity hairstylist Laini Reeves, the secret behind the 43-year-old actress' glossy, defined waves was Tresemmé Bonding Oil. The lightweight treatment is designed to smooth, strengthen and add mirror-like shine without weighing hair down. "For Emily's London premiere look, I wanted the hair to feel sleek, sculpted, and effortlessly modern," Reeves wrote in an Instagram post.