Machine Girl is an American electronic act formed on Long Island, New York in 2012 by producer Matt Stephenson. It grew into a live group with drummer Sean Kelly in 2015 and guitarist Lucy Caputi in 2024. The project fuses breakcore, digital hardcore, footwork and jungle into frenzied, high intensity live shows built on live drums and distorted electronics. Machine Girl has released acclaimed records including U-Void Synthesizer and MG Ultra, becoming a defining name in the modern digital hardcore underground. Their concerts are known for chaotic energy and a devoted following.