Iris was written by Goo Goo Dolls frontman John Rzeznik for the 1998 film City of Angels, where it played over the story of an angel who falls in love with a human. Released as a single that year, it became one of the band's biggest hits and a defining rock ballad of the late 1990s, helped by its use in the film's emotional climax. The song has endured through radio, film soundtracks and social media, where short clips are reused to signal sincerity, longing and bittersweet nostalgia.