What is 1d?

1D is a British-Irish boy band that was formed in 2010 on the British television music competition "The X Factor." The group consists of Niall Horan, Liam Payne, Harry Styles, and Louis Tomlinson. 1D quickly gained worldwide fame and success, becoming one of the biggest boy bands of all time. They have released several albums, including "Up All Night," "Take Me Home," "Midnight Memories," and "Made in the A.M." 1D went on hiatus in 2016 to pursue solo projects but have expressed interest in reuniting in the future.