The "Downtown" rapper-and-producer duo, whose whimsical performance at this year's VMAs made us shout exclamations of joy at our TVs, will take the stage as the show broadcasts live around the world -- and at 8 p.m. ET/PT on MTV in the U.S.
Mack and Ryan join the bangin' previously announced performers Pharrell Williams, Ed Sheeran & Rudimental, Ellie Goulding, Jason Derulo, Tori Kelly, James Bay, Jess Glynne, twenty one pilots, Martin Garrix and Afrojack for a night of celebration and sure-to-be instantly memorable moments.
Of course, every good/cute/badass awards show needs a good/cute/badass host, and this year, we've got Ed Sheeran, along with co-host Ruby Rose. It's going to be everything you ever needed.
You can vote for all your faves -- including Taylor Swift, Nick Jonas, Drake, Justin Bieber and more -- at mtvema.com until Oct. 24 at 11:59 p.m. CET, so get to clicking!