Gareth Peirce (born Jean Margaret Webb; March 1940) is a British solicitor and human rights activist. She has worked on a number of high-profile cases involving allegations of human rights injustices. Her work with Gerry Conlon and the Guildford Four – wrongly convicted of bombings carried out by the Provisional Irish Republican Army – was chronicled in the film In the Name of the Father (1993), in which she was portrayed by Emma Thompson.
During her career she represented Judith Ward, who had been wrongfully convicted in 1974 of several IRA-related bombings, the Guildford Four, the Birmingham Six, several mineworkers after the Battle of Orgreave, the family of Jean Charles de Menezes and Moazzam Begg, a man held in extrajudicial detention by the American government. Julian Assange, the founder of WikiLeaks, appointed Peirce as his solicitor in Assange v Swedish Prosecution Authority.
Of her defence of Muslim suspects accused of terrorism Peirce has said:
We have lost our way in this country. We have entered a new dark age of injustice and it is frightening that we are overwhelmed by it. I know I am representing innocent people; innocent people who know that a jury they face will inevitably be predisposed to find them guilty.