Riot Fest has posted a teaser video for the Chicago and Denver dates. There is a planned announcement of the line up tonight at 7 p.m. Toronto's line up has already been released and includes Social Distortion, Brand New, Restorations, Buzzcocks, Alkaline Trio, Dropkick Murphys, PUP, Lucero, The New Pornographers, The Flaming Lips and many more.

Judging by this video, we can take a safe bet that Social Distortion, Rise Against, Taking Back Sunday, Descendents and Slayer will make the line up. You can take a look and make your own assumptions under Read More and check back tonight for the official announcement.