The gradual rollout of the 2015 TomorrowWorld headliners hit a crescendo today, finishing up with the full phase one lineup being revealed in both poster and video form. Phase one includes all previously announced headliners, including Martin Garrix, Armin van Buuren, Hardwell and more, and the addition of two previously unannounced headliners: Former Swedish House Mafia member Steve Angello and Dutch mega producer and DJ Tiësto. The remaining lineup will be announced at a later date.

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TomorrowWorld hits Chattahoochee Hills, Georgia on September 25-27, 2015. Check out the full phase one lineup poster and video announcement below:

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