Mercury – Act 1 is the first half of the fifth studio album by American pop rock band Imagine Dragons, released on September 3, 2021, by Kidinakorner and Interscope Records in the United States. Imagine Dragons recorded the album in 2018 after their previous album, Origins. It was later modified in early 2022 to include "Enemy", from the Arcane League of Legendssoundtrack. The album was executive produced by Rick Rubin, who also executive produced its successor Mercury – Acts 1 & 2, released on July 1, 2022, which Act 1 was included as part of.
