The song was released through Kidinakorner and Interscope on November 7, 2022, as the fourth single from the band's fifth studio album, Mercury – Acts 1 & 2.

[4] An alternate version of the song was released with the Inner City Youth Orchestra of Los Angeles and Coke Studio on June 23, 2023.

[5][6] "Symphony" was written by band members Dan Reynolds, Wayne Sermon, Ben McKee, Daniel Platzman as well as Joel Little, Adio Marchant, and Talay Riley.

[citation needed] The visualizer video for "Symphony" was released on November 7, 2022, and was shot and directed by Matt Eastin.

[8] The video features various clips of the band performing during the Mercury World Tour overlayed with a purple hue and special effects of rings, circles, and other shapes.