Vicki Ree Principal (born January 3, 1950), later known as Victoria Principal, is an American actress, producer, entrepreneur, and author, best known for her role as Pamela Barnes Ewing on the American primetime television soap opera Dallas. She spent nine years on the long-running series, leaving in 1987. Afterwards, she opened her own production company, Victoria Principal Productions, focusing mostly on television films. In the mid-1980s, she became interested in natural beauty therapies, and in 1989, she created an eponymous line of skincare products, Principal Secret. Principal became a best-selling author, writing three books about beauty, skincare, fitness, well-being, and health: The Body Principal (1983), The Beauty Principal (1984), and The Diet Principal (1987). In the 2000s, she wrote a fourth book, Living Principal (2001). She is also a two-time Golden Globe Award nominee.