Guerilla Girls, a feminist group fighting sexism in arts practice. Formed in New York in 1985, the group maintain their anonymity by wearing gorilla masks and using the names of dead female artists as pseudonyms, e.g. Frida Kahlo and Hannah HÖch. They put pressure on organisations such as the Metropolitan Museum of Art in New York by uncovering statistics that reveal the extent of patriarchy in the art world past and present. The original group disbanded in 2001 but several Guerrilla Girl spin-offs still exist. Recent campaigns include ‘Unchain female directors’ targeted at the male-dominated world of the Hollywood film studio.