The first single released from their second album, Start Something, was "Burn Burn" in November 2003, and was originally scheduled to be closely followed by the release of the album.[5] The album was released in the UK in February 2004 and peaked at number four in the UK Albums Chart.[6] The album has sold more than 2.5 million copies worldwide.[3] The second track from Start Something, "Last Train Home", reached number one on the Alternative Songs chart in the US,[4] and peaked at number eight in the UK, making it the band's first UK top-ten single.[6] Other released singles include; "Wake Up (Make a Move)", "Last Summer" and "Goodbye Tonight". In 2004, the album was certified platinum by the British Phonographic Industry in the UK and gold by the RIAA in the US.[7][8]
The band's fourth studio album The Betrayed was delayed many times.[9] The title and several tracks were revealed in 5 August issue of Kerrang! magazine, and the album was released on 18 January 2010.
The band's fifth and final studio album Weapons was released on 2 April 2012.
In December 2012, lead singer Ian Watkins was charged with multiple sexual offences against minors, infants and animals. Lostprophets cancelled all tour dates and disbanded in October 2013, before the end of Watkins' trial. Watkins pleaded guilty to several charges. In December 2013, he was sentenced to 29 years of imprisonment plus six years of extended supervision on licence.[10][11] In June 2014, the remaining members joined American singer Geoff Rickly to form a new band, No Devotion.