"Enemy" is a song by American pop rock band Imagine Dragons and American rapper JID. It was released through Interscope Records and Kidinakorner on October 28, 2021, as the lead single of the soundtrack to the Netflix animated series Arcane, to which it also serves as the opening theme. The song was written by the artists alongside Justin Tranter and the producers Mattman & Robin. The song was also included on the band's fifth studio album Mercury – Act 1 (2021) and its reissue, Mercury – Acts 1 & 2 (2022). The song became JID's first song to reach the top 5 in the US, and became the band's first song to reach the top 5 since the 2017 song "Thunder". In 2023, for the 35th anniversary of Alternative Airplay – where "Enemy" charted for 54 weeks, of which 9 were spent at the top spot – Billboard ranked the song as the 14th-most successful in the chart's history.