Evil isn’t born, it’s made.
From the press release:
From Disney comes "Maleficent"—the untold story of Disney's most iconic villain from the 1959 classic "Sleeping Beauty." A beautiful, pure-hearted young woman, Maleficent has an idyllic life growing up in a peaceable forest kingdom, until one day when an invading army threatens the harmony of the land. Maleficent rises to be the land's fiercest protector, but she ultimately suffers a ruthless betrayal—an act that begins to turn her pure heart to stone. Bent on revenge, Maleficent faces an epic battle with the invading king's successor and, as a result, places a curse upon his newborn infant Aurora. As the child grows, Maleficent realizes that Aurora holds the key to peace in the kingdom—and perhaps to Maleficent's true happiness as well.