EDM festival TomorrowWorld -- which will have its third installment Sept. 25-27 outside of Atlanta in Chattahoochee Hills -- has announced phase two of its lineup.

Bassnectar, Kaskade, Benny Benassi, Bingo Players, Borgore, Bro Safari, The Chainsmokers, DVBBS, Guy Gerber, Laidback Luke, The Magician, Maya Jane Coles, Oliver Heldens, Porter Robinson, Rudimental, Seven Lions and Thomas Jack will join previously announced acts Adam Beyer, Adventure Club, Afrojack, Armin van Buuren, Big Gigantic, David Guetta, Dimitri Vegas and Like Mike, Excision, Ferry Corsten, Flux Pavilion, Get Real, Hardwell, Jamie Jones, Martin Garrix, Paul van Dyk, Showtek, Steve Angello and Tiesto.

"I’m excited to return to TomorrowWorld for the second year in a row," Kaskade said in a statement. "The undeniable energy and unique grounds make it a one-of-a-kind experience."

A crowd dances to electronic beats at TomorrowWorld electronic music festival in Chattahoochee Hills, South of Atlanta, on Saturday, September 27, 2014. HYOSUB SHIN / HSHIN@AJC.COM

Credit: Yvonne Zusel

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Credit: Yvonne Zusel

The theme of this year's gathering is The Key to Happiness. Last year's festival was estimated to have brought $93.9 million to Georgia. TomorrowWorld's sister festival, TomorrowLand, runs July 24-26 in Boom in Belgium.

Single-day tickets are on sale now for TomorrowWorld, as well as limited three-day passes and Tier 2 tickets for DreamVille, TomorrowWorld’s on-site camping city.

Check out all ticketing information here and stay tuned for more updates.

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