Steve Ignorant (born Steven Williams in 1957) is a singer and artist. He co-founded the anarcho-punk band Crass with Penny Rimbaud in 1977. After Crass stopped performing in 1984, he has worked with other groups including Conflict, Schwartzeneggar, Stratford Mercenaries, Current 93 (under the name Stephen Intelligent), US punk band Thought Crime, as well as being an occasional solo performer.
He is also a sculptor, and has worked as a traditional Punch and Judy performer using the name Professor Ignorant. In recent years he has developed an interest in the history of traditional east London music hall performance.
On 24 and 25 November 2007 he performed Crass's entire Feeding of the 5000 live at the Shepherds Bush Empire, United Kingdom, backed by a band of selected guests. Other members of Crass were not involved in these concerts. "I acknowledge and respect Steve's right to do this", Penny Rimbaud said, "but I do regard it as a betrayal of the Crass ethos" Ignorant had a different view: "I don't have to justify what I do. (...) Plus, most of the lyrics are still relevant today. And remember that three-letter word, 'fun'?"