Producers announced Tuesday on Twitter that Post Malone, 24, will perform at the New York show Dec. 31 in Times Square.
"We're no good at goodbyes, but we're excited to say #Hello2020 with headliner @PostMalone LIVE from Times Square!" the post reads.
"Making 2020 right by ringing in the new year with @BTS_twt!" producers said.
Post Malone released his third studio album, Hollywood's Bleeding, in September. He is nominated for two awards at the 2020 Grammys for his song "Sunflower" with Swae Lee.