Master the Royal Blowout at Home With Tips From Kate Middleton's Hairdresser

Make sure you roll all sections of hair in the same direction (under, not over). For the best results, each section should be no wider than the roller itself. Once all your hair is in rollers, spritz with hair spray, which will cool along with the curls and set on the hair. Don't take your rollers out until the hair is completely cool. It's this change of state that will make your blowout stay looking perfect for as long as possible.