Lostprophets were a Welsh rock band from Pontypridd, Wales formed in 1997. Founded by lead vocalist and lyricist Ian Watkins, bassist (later guitarist) Mike Lewis, drummer Mike Chiplin and guitarist Lee Gaze, they were originally a side-project to hardcore punk band Public Disturbance. They were also part of the Cardiff music scene.
Lostprophets released five studio albums, with their final release Weapons released on 2 April 2012. The band achieved two Top 10 hits on the UK Singles Chart ("I Knew You Were Trouble" and "Rooftops"), one number-one single on the US Alternative Songs chart ("Last Train Home"), several Kerrang! Awards and nominations, and sold 3.5 million albums worldwide.