Kathleen Hanna is an American musician, feminist, and activist, best known as the lead singer of the punk band Bikini Kill. She played a significant role in the riot grrrl movement of the early 1990s, which combined punk music with feminist ideals, advocating for women's rights and empowerment. In addition to her work with Bikini Kill, Hanna has been involved in other musical projects, including Le Tigre and The Julie Ruin. Her influence extends beyond music, as she has also contributed to various feminist causes and has been a vocal advocate for social change throughout her career.