"The Fly" is a song by Irish rock band U2. It is the seventh track from their 1991 album, Achtung Baby, and it was released as the album's first single on 21 October 1991 by Island Records. "The Fly" introduced a more abrasive-sounding U2, as the song featured danceable hip-hop beats, industrial textures, distorted vocals, and an elaborate guitar solo. Lead vocalist Bono described the song as "the sound of four men chopping down The Joshua Tree", due to its departure from the sound that had traditionally characterised the band in the 1980s.

U2 are an Irish rock band formed in Dublin in 1976. The group consists of Bono, the Edge, Adam Clayton, and Larry Mullen Jr.. Initially rooted in post-punk, U2's musical style has evolved throughout their career, yet has maintained an anthemic quality built on Bono's expressive vocals and the Edge's chiming, effects-based guitar sounds. Bono's lyrics, often embellished with spiritual imagery, focus on personal and sociopolitical themes. Popular for their live performances, the group have staged several elaborate tours over their career.