Organizers expected to draw a crowd approaching a quarter-million people, making it one of the largest public music events ever held in South Korea.

All seven members recently completed South Korea’s mandatory military service and hope to reclaim their status as one of the world’s biggest pop acts.

Those without tickets arrived at the venue before the sun rose on Saturday to stake out areas that offered unobstructed views of the stage.

South Korean megastars BTS reunited Saturday for their first show in nearly four years in front of enormous crowds in Seoul for a K-pop extravaganza livestreamed to millions more worldwide. Five million fans pre-saved it on Spotify,

The K-pop supergroup's massive outdoor concert, being broadcast live from Seoul landmark Gwanghwamun, is officially underway.

Four years ago, the boy band went silent — but not before setting off a chain reaction that would reshape the pop market, conquer the Grammys and prime the world for an inevitable comeback.

On March 21, BTS made their long-awaited return to the stage after nearly four years apart, performing live at Seoul's iconic Gwanghwamun Square — with millions more watching via a live stream on Netflix across 190 countries.