They join dance music icon Robyn, who was previously confirmed as a headliner along with Run the Jewels.
The fest will also feature livestreams with talent from "Rick and Morty" and the world premiere of a new Run the Jewels music video.
The Sigur Rós frontman is releasing the single on Wednesday, September 30th.
SG Lewis also announced his debut album coming later this year.
Grab your selfie stick and have yourself a dance party.
Ten years later, "Dancing On My Own" has stood the test of time.
The famed dance music singer, DJ, and record producer opened up to Annie Mac in her new podcast.
Prince, Marvin Gaye, Kraftwerk, and more are included on Robyn's special Met Gala-inspired playlist.
Robyn is throwing her hat into the live stream ring this Friday.