Arianators, assemble! Ariana Grande is now absolutely, 100% confirmed to make an appearance on the soundtrack for "The Hunger Games: Mockingjay -- Pt. 1."
Grande retweeted Lorde's confirmation, and added a message all her own about "All My Love."
Ariana first teased the new song during an intimate, at-home livestream for fans last week, saying: "It's a very interesting song. It's very different."
When Lorde originally released the "Mockingjay" track listing, which features heavy-hitters like Kanye West, Haim, Pusha T and Charli XCX, the 17-year-old singer/songwriter left a mystery "track 5" unnamed, later explaining: "it's just not quite finished."
The soundtrack is due out November 17, with "The Hunger Games: Mockingjay - Part 1" hitting theaters November 21.