"It is long overdue that one of the greatest rock cities in the world has a festival of its own," say Disturbed. "We are honoured and excited to be one of the headliners at the inaugural Open Air festival in our hometown of Chicago."

They'll join previously announced headliners Rammstein, plus Meshuggah, In This Moment, Hollywood Undead, Trivium, Carcass, Hatebreed, Periphery, Drowning Pool, Butcher Babies, Through Fire, Pop Evil, Gojira, Deafheaven, The Devil Wears Prada, Helmet and more. Read more - here.

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