The Up All Night Tour was the first headlining concert tour by English-Irish boy band One Direction, in support of their debut studio album, Up All Night (2011). It began in December 2011 and was One Direction's first solo tour after being formed in the seventh series of The X Factor and being signed to Syco Records. The concert tour was announced in September 2011, with the initial dates for UK and Ireland being revealed. The tour eventually expanded to Oceania and North America, with the band playing 54 shows in total.

One Direction, often shortened to 1D, are an English-Irish pop boy band formed in London in 2010. The group is composed of Niall Horan, Liam Payne, Harry Styles, Louis Tomlinson, and previously Zayn Malik until his departure from the group in March 2015. They became one of the best-selling boy groups of all time before going on an indefinite hiatus in 2016.