Update April 26, 2021: The full lineup for the 2021 edition of the Rebel Rock Festival has now been revealed. There will be six headliners over the three days of music with Machine Gun Kelly now joining Limp Bizkit atop the Friday bill, Legends of Wu-Tang joining Five Finger Death Punch topping Saturday's lineup and The Used and Rise Against closing out the weekend on Sunday. See the full lineup and Rebel Rock Festival poster below.
Update: Organizers for the 2021 Rebel Rock Festival have now filled in the blanks on their lineup, including adding Rise Against as the third headliner along with Limp Bizkit and Five Finger Death Punch. Other new additions to the bill include Legends of Wu-Tang, The Used, Killswitch Engage, Parkway Drive, Pop Evil, Hatebreed, Knocked Loose, Fit for a King, Ded, Dirty Machine, Fighting Giants, Falling Through April, Farewell to Fear, Dropout Kings, Rising Up Angry and Below 7. There still remains five vacancies on the bill, but you can see the updated lineup here.