In March 2008, she was attacked with acid by her ex-boyfriend and an accomplice, causing major damage to her face and blindness in one eye. Piper underwent pioneering surgery to restore her face and vision. Both attackers were convicted and given life sentences. In 2009, Piper gave up her right to anonymity in order to increase awareness about burn victims. Her experience was documented in the 2009 Channel 4 documentary Katie: My Beautiful Face part of the Cutting Edge series. It has subsequently been sold internationally.