NEW YORK (AP) — Dina Merrill, the rebellious heiress who defied her super-rich parents to become an actress, often portraying stylish wives or "the other woman," has died. With the help of Katharine Hepburn, who recommended her for the 1957 comedy "The Desk Set," Merrill was a popular star for years, due in part because of her resemblance to Grace Kelly.