It's official: as hinted earlier this week, Green Day, Fall Out Boy and Weezer are joining forces for the Hella Mega stadium tour, which will kick off in Europe in June and hit North America after that. The first U.S. date is July 17th at Seattle’s T-Mobile Park, with the trek wrapping up on August 29th at Citizens Bank Park in Philadelphia.

The opening act for the entire tour will be the Interrupters. They'll play first every night, followed by Weezer, Fall Out Boy and then Green Day to close out the show. All three bands were scheduled at press time to play a special preview gig on Tuesday night (September 10th) at the Whiskey A Go Go in Los Angeles.

Green Day's Billie Joe Armstrong said the tour was his band's idea, explaining, ”We talked about how we weren’t really wanting to do stadiums and do something that was like throwback to the Monsters of Rock Tour. There was, of course, Fall Out Boy and Weezer and now we’re stoked.”

Bassist Mike Dirnt told us a while back that Green Day is at its best on the stage: ["I mean, whenever we go out on the stage, we always want to give a hundred and fifty percent, you know, and just kill it, and leave that stage just annihilated."] SOUNDCUE (:07 OC: . . . stage just annihilated.)

All three bands have released new songs to promote the tour: Green Day’s “Father of All…” comes from the trio's new album of the same name, which arrives February 7th. Weezer’s new song, “The End Of The Game,” comes from its upcoming LP Van Weezer, which will come out May 15th. Fall Out Boy's new tune, “Dear Future (Hands Up),” will appear on its upcoming compilation album Greatest Hits: Believers Never Die — Volume Two.

Confirmed Green Day/Weezer/Fall Out Boy Hella Mega tour dates (subject to change):
July 17 – Seattle, WA – T-Mobile Park
July 21 – San Francisco, CA – Oracle Park
July 24 – San Diego, CA – Petco Park
July 25 – Los Angeles, CA – Dodger Stadium
July 28 – Commerce City, CO – Dick’s Sporting Goods Park
July 31 – Arlington, TX – Globe Life Field
August 1 – Houston, TX – Minute Maid Park
August 5 – Miami, FL – Hard Rock Stadium
August 6 – Jacksonville, FL – TIAA Bank Field
August 8 – Atlanta, GA – SunTrust Park
August 11 – Minneapolis, MN – Target Field
August 13 – Chicago IL – Wrigley Field
August 15 – Pittsburgh, PA – PNC Park
August 16 – Hershey, PA – Hersheypark Stadium
August 19 – Detroit, MI – Comerica Park
August 21 – Washington, DC – Nationals Park
August 22 – New York, NY – Citi Field
August 24 – Toronto, ON – Rogers Centre
August 27 – Boston, MA – Fenway Park
August 29 – Philadelphia, PA – Citizens Bank Park