It looks like Aftershock Festival will be bigger and better than ever in 2021. On Thursday, the festival confirmed that Machine Gun Kelly, Rise Against, Parkway Drive and Rancid are just a few of the artists joining the 2021 festival lineup.

As well, it looks like headliners My Chemical Romance aren't the only ones performing a reunion set at next year's event.

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The event, which was supposed to happen this month, is now taking place from Oct. 7 – 10, 2021. As well, an additional day has been added for next year’s festival.

“We are excited to announce that, thanks to our friends at Jack Daniel’s, we are adding a fourth night to Aftershock 2021, as an epic celebratory evening to kick-off the return of California’s favorite rock festival.”

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Now, Aftershock has announced a slew of other artists that are playing the festival in 2021. Limp Bizkit, The Offspring, Social Distortion, Volbeat, Mastodon, Gojira and SEETHER are just a few of the acts joining Aftershock 2021.

Passes for Aftershock 2021 are available to purchase here. Single-day general admission tickets start at $119 while 4-Day general admission passes are $379.50.

Who do you think the mysterious act reuniting for Aftershock 2021 is? Let us know in the comments below.