British band Bastille pose on the red carpet ahead of the MTV Europe Music Awards at the Bizkaia Arena in the northern Spanish city of Bilbao on November 4, 2018. (AFP/Ander Gillenea)
The single appears on the British band's forthcoming album Doom Days, due out on June 14 via Virgin Records.
"Joy" describes the hangover-killing power of a simple phone call from someone special.
"Oh joy, when you call me/I was giving up, I was giving in/Joy, set my mind free/I was giving up, I was giving in/How'd you always know when I'm down?" sings frontman Dan Smith accompanied by a gospel choir.
"Joy" closes Bastille's new album Doom Days, which is described as an "apocalyptic house party".
"That glimmer of hope at the end of the album says everything. The smallest human gesture can pull you back from the brink," said Dan Smith in a statement.
Doom Days was recorded in 2018 at the band's studio in South London. It marks the band's third studio album, following their 2016 record Wild World. The LP features eleven tracks, among which are the previously released "Quarter Past Midnight" and title track "Doom Days".
Doom Days will be released on June 14. Bastille also announced a North American tour in support of the new album, which will kick off in Philadelphia on September 16. Tickets for most shows will go on sale on May 10 via the band's official website.