Ingrid Elizabeth Newkirk is a British-American animal activist, author and the president of People for the Ethical Treatment of Animals (PETA), the world's largest animal rights organization.

The animal rights movement, sometimes called the animal liberation, animal personhood, or animal advocacy movement, is a social movement that seeks an end to the rigid moral and legal distinction drawn between human and non-human animals, an end to the status of animals as property, and an end to their use in the research, food, clothing, and entertainment industries.