U2 are a rock band from Dublin, Ireland. The band consists of Bono (lead vocals and rhythm guitar), The Edge (lead guitar, keyboards, and backing vocals), Adam Clayton (bass guitar), and Larry Mullen Jr. (drums and percussion). U2 have been one of the most popular acts in the world since the mid-1980s. The band has sold more than 170 million albums worldwide, and has won 22 Grammy Awards, more than any other rock band.

U2 formed in 1976 when the members were teenagers with limited musical proficiency. By the mid-1980s, however, the band had become a top international act, noted for its anthemic sound, Bono´s impassioned vocals, and The Edge´s textural guitar playing. Their success as a live act was greater than their success as a record-selling act until their 1987 album, The Joshua Tree, brought them mega-stardom.

They continue to enjoy high levels of commercial and critical success. The band are active in human rights, international development, and social justice causes, such as Amnesty International, Make Poverty History, the ONE Campaign, Live Aid, Live 8, Bono´s DATA (Debt, AIDS, Trade in Africa) campaign, and Music Rising.