The Killers have been announced for the festival after announcing their sixth album Imploding The Mirage earlier this month.

Kings of Leon are yet to follow up their 2016 album WALLS.

The new headliners will play next year's festival alongside Taylor Swift, Billie Eilish, Pixies, alt-J, Tove Lo, Foals, Hinds, Sigrid, Diplo, Major Lazer, Haim, London Grammar, Marika Hackman, Pale Waves, and many more.

Madrid's Mad Cool festival takes place from 8-11 July 2020. Tickets go on sale 1 December from 11am GMT. Find out more.