Kathleen Hanna is an American singer, musician, and pioneer of the feminist punk riot grrrl movement, as well as a punk zine writer. In the early-to-mid-1990s, she was the lead singer of the feminist punk band Bikini Kill, and then fronted Le Tigre in the late 1990s and early 2000s. Since 2010, she has recorded as The Julie Ruin.

In 2009, Hanna made her zines, art pieces, photography, video, music, journals, and other material which focus on the early formation of the Riot Grrrl movement available at the Fales Library at New York University. A documentary film about Hanna, titled The Punk Singer, directed by Sini Anderson, was released in 2013, detailing her life and career, as well as revealing her years-long battle with Lyme disease. Hanna is married to Adam Horovitz of the Beastie Boys.