AceShowbiz - NCT 127 has made their first U.S. debut when they hit the stage in the Monday, October 8 episode of "Jimmy Kimmel Live!". During their appearance on the show, the 10-piece group debuted live performance of their new and first English song "Regular".

Their appearance was filmed at sold-out mini concert in Los Angeles and marked their first performance for their participation in Apple Music's "Up Next" artist series. Besides delivering rendition of their new song, the K-Pop group belted out "Touch" and "Cherry Bomb". While their performance looked flawless on television, fans reported that Taeyong fell six times due to slippery stage, incompatibility of the members' shoes with the stage and more.

The music video for "Regular" itself was released hours ahead of their performance. The clip features the members of the group showcasing their choreography against dramatic night backdrop, with member Mark roaming through alleys with a tiger by his side.

Talking about their first English singer in an interview with Zane Lowe of Beats 1, Mark said, "Even for us English speakers, it was hard because we were already used to recording in Korean and everything. But we've realized that we wanted to focus on spreading our music to the world. And so, we needed an English version of the song, and we wanted our international fans to listen to it as well."

A Korean version of "Regular" and its music video will make its way out later this week. Their new album, "Regular-Irregular", will hit the shelves on October 12.

NCT 127 will hit the red carpet at the 2018 American Music Awards at the Microsoft Theater in Los Angeles on Tuesday, October 9. They are also set to appear on ABC's upcoming special celebrating Mickey Mouse's 90th anniversary on November 4.