Bikini Kill was an American punk rock band formed in Olympia, Washington, in October 1990. The group consisted of vocalist and songwriter Kathleen Hanna, guitarist Billy Karren, bassist Kathi Wilcox, and drummer Tobi Vail. The band is widely considered to be the pioneer of the riot grrrl movement, and was notorious for its radical feminist lyrics and fiery performances. Their music was characteristically abrasive and hardcore-influenced.