One Direction, often shortened to 1D, were an English pop boy band formed in London in 2010. The group consisted of Niall Horan, Zayn Malik, Liam Payne, Harry Styles, and Louis Tomlinson. The group sold over 70 million records worldwide, making them one of the best-selling boy bands of all time, before going on an indefinite hiatus in 2016.
Formed on British singing competition The X Factor in 2010, the group were propelled to global success by social media. One Direction's debut single "What Makes You Beautiful" was a commercial and international success, reaching number one on the UK singles chart and being performed by the band at the 2012 Summer Olympics closing ceremony. They became the first British act to have their debut album top the charts on the Billboard 200 with Up All Night, and subsequently became the first band to have their first four albums debut at number one following the releases of Take Me Home, Midnight Memories, and Four.
Considered teen idols, One Direction were often subject to fan hysteria comparable to Beatlemania. They embarked on four world tours, two of which were all–stadium.