Penny Rimbaud (born 8 June 1943) is an English writer, poet, philosopher, painter, musician and activist. He was a member of the performance art groups EXIT and Ceres Confusion, and in 1972 was co-founder of the Stonehenge Free Festival, together with Phil Russell aka Wally Hope. In 1977, alongside Steve Ignorant, he co-founded the seminal anarchist punk band Crass, who disbanded in 1984.