The xx are an English indie pop band, formed in Wandsworth, London in 2005. Oliver Sim and Romy Madley-Croft started the band as a duo when they were 15. Guitarist Baria Qureshi joined once they began performing in 2005, with Jamie Smith joining a year after. Their debut album was released in August 2009 by British independent label Young Turks. It became an instant classic.