Kellie-Jay Keen (aka Posie Parker) is one of the most controversial voices in the Gender Critical movement.
Kellie-Jay Keen, also known as Posie Parker, is a British gender-critical and anti–transgender rights activist. She is the founder of the group Standing for Women and special advisor to the Women’s Liberation Front (WoLF). Keen has been described as a key figure against the United Kingdom’s Gender Recognition Act of 2004. She has been credited for popularizing the use of the term “adult human female” to define a woman; the term later became associated with gender-critical feminism.
Keen-Minshull describes herself as a woman’s rights activist, but says that she is “not a feminist”. She has used billboards, posters, stickers and social media to promote anti–transgender rights messages, and has held events in the United Kingdom, the United States, Australia, and New Zealand that have been protested against by supporters of transgender rights.