Katherine Murray Millett was an American feminist writer, educator, artist, and activist. She attended Oxford University and was the first American woman to be awarded a degree with first-class honors after studying at St Hilda's College, Oxford. She has been described as "a seminal influence on second-wave feminism", and is best known for her book Sexual Politics (1970).
After featuring her on their cover in August of 1970, Time Magazine outed her as bisexual in December of the same year. There was concern among many feminists of the time that this revelation would hurt or fragment the movement.
Her books were motivated by her activism, such as woman's rights and mental health reform, and several were autobiographical memoirs that explored her sexuality, mental health, and relationships. In the 1960s and 1970s, Millett taught at Waseda University, Bryn Mawr College, Barnard College, and the University of California, Berkeley. Between 2011 and 2013, she won the Lambda Pioneer Award for Literature, received Yoko Ono's Courage Award for the Arts, and was inducted into the National Women's Hall of Fame.
In her autobiographical book Flying (1974), Millett writes extensively about her bisexuality.
She was also a sculptor whose works have been displayed around the world.