Donna Douglas, who played the buxom tomboy Elly May Clampett on the hit 1960s sitcom "The Beverly Hillbillies," has died. Douglas died Thursday in Baton Rouge, Louisiana, near her hometown of Zachary. The cause of death was pancreatic cancer, said her niece, Charlene Smith. Douglas was 82. She was best known for her role in "The Beverly Hillbillies," the CBS comedy about a backwoods Ozark family who moved to Beverly Hills after striking it rich from oil discovered on their land.