Riot Fest has added several names to its already impressive lineup with the Flaming Lips, Sleater-Kinney and more joining the bill for the two-city, two-weekend festival in Denver and Chicago.

Also added to the list are Julian Marley, who will be playing all of Bob Marley and the Wailers’ Exodus, Gogol Bordello, DeVotchka, 2 Chainz, The Bronx and more. They join a lineup that already includes Jane’s Addiction, Morrissey, The Original Misfits featuring Glenn Danzig, Ween, Death Cab for Cutie, Rob Zombie and many more.

Riot Fest will take place in Denver on September 2–4 and in Chicago on September 16–18. Full weekend lineups and ticketing information can be found here. Weekend passes are now available, and single-day passes will go on sale today at 12pm CST.