Music Times had reported rumors nearly a month ago but Mayhem Fest made its lineup official today, declaring that Slayer and King Diamond would be the major headliners. Other acts performing will include Hellyeah, the Devil Wears Prada, Whitechapel and Thy Art Is Murder.

This is going to be Slayer's third time headlining Mayhem Fest during its inception during 2008. It will be King Diamond's first time performing as part of the event, and he made it out to be quite a spectacle based on his statement, which was full of hints, both creepy and ambiguous.

"Slayer and King Diamond on the same stage-it does not get more devilish than this!" he said. "We will be putting on a one-hour set with the full King Diamond stage production. As for a set list, I'm not gonna reveal that here, but it will be built around Dreams of Horror. The Puppet Master will be there with Grandma, and we will even go as far back in time as to 1777 (hint). You're all in for one hell of a show if you come to this Sabbath!"

Uh, right. For now you can check out the dates for Mayhem Fest below and figure out whatever he's talking about when it swings near your hometown.

06/26: San Diego @ Sleep Train Amphitheater

06/27: San Bernardino, CA @ San Manuel Amphitheater

06/28: Mountain View, CA @ Shoreline Amphitheater

06/30: Auburn, WA @ White River Amphitheater

07/01: Boise, ID @ Idaho Center Amphitheater

07/03: Phoenix @ Ak-Chin Amphitheater

07/04: Albuquerque, NM @ Isleta Amphitheater

07/05: Denver @ Red Rocks

07/07: Council Bluffs, IA @ Harrah's Council Bluffs

07/08: Milwaukee @ Eagles Ballroom

07/10: Noblesville, IN @ Kilpsch Amphitheater

07/11: Clarkston, MI @ DTE Energy Amphitheater

07/12: Tinley Park, IL @ First Midwest Bank Amphitheater

07/15: Toronto @ Molson Canadian Amphitheatre

07/17: Camden, NJ @ Susquehanna Bank Arts Center

07/18: Burgettstown, PA @ First Niagara Pavilion

07/19: Hartford, CT @ Xfinity Theatre

07/21: Holmdel, NJ @ PNC Bank Arts Center

07/22: Gilford, NH @ Meadowbrook (Bank of NH Pavilion)

07/24: Bristow, VA @ Jiffy Lube Live

07/25: Boston @ Xfinity Center

07/26: Wantagh, NY @ Nikon at Jones Beach

07/29: Atlanta @ Aaron's Amphitheater at Lakewood

07/31: San Antonio @ Whitewater Amphitheater

08/01: Houston @ Cynthia Woods Mitchell Pavilion

08/02: Dallas @ Gexa Energy Amphitheater

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