The new single features on the BTS World Original Soundtrack, and is listed as "Pt. 1" of the single.
Hints of "Dream Glow" first circulated last month when Charli XCX and BTS were listed as songwriters and composers on the new single on Broadcast Music, Inc. (BMI).
It's the first single from BTS since their Map Of The Soul: Persona album, and arrives ahead of their Japanese single "Lights".
BTS' World Original Soundtrack will accompany the release of their new mobile game that lands later this month.
Charli XCX recently featured on Diplo and Herve Pagez's "Spicy", which reworked Spice Girls' "Wannabe", and also debuted new Christine and the Queens collaboration "Gone" at Primavera Sound in Barcelona last week.
Earlier this week she revealed that she has a second collaboration with Troye Sivan.
