With Outkast already on the bill and slated to headline Friday night, Bestival 2014 organizers have announced that Beck and Foals will top the bill on Thursday and Saturday, respectively. That leaves only Sunday's headliner to be revealed, and the official event poster teases fans with a question mark.

Also on hand Sept. 4-7, when the festival goes down on the Isle of Wight, will be Disclosure, Major Lazer, London Grammar, Sam Smith, Wild Beasts, Clean Bandit, Caribou, Chvrches and Laura Mvula -- all new lineup additions.

Bestival organizers have also revealed this year's theme to be 'Desert Island Disco,' so those inclined to wear costumes might want to start looking for pirate and sailor outfits.

For more information, visit 2014.bestival.net/.