Arirang', the group's first full-group performance in three years, set a new record, making BTS the first K-pop group to host an exclusive live performance at the historic Gwanghwamun Square.

Local reports estimate that roughly 40,000 people gathered across central Seoul to watch K-pop band BTS reunite.

The South Korean band broke into American pop culture by hitting the talk shows, performing on “Saturday Night Live” and appearing at the White House.

The wildly popular K-pop group BTS is back with a new album, Netflix special and a massive world tour following a four-year pause. (AP Photo)

The K-pop superstar will have to limit movement during Saturday's global livestream from Seoul, which marks BTS' first full-group performance in nearly four years and a major test of Netflix's live ambitions.

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.

This is what Director Hamish Hamilton, who directed “BTS Comeback Live: Arirang” at Gwanghwamun Square in Seoul at 8 p.m. on the 21st, revealed. Hamilton, co-founder of global production company Done + Dusted and dubbed the “king of live events,