Up All Night is the debut studio album by English-Irish boy band One Direction, released by Syco Records in November 2011 in Ireland and the United Kingdom, followed by a worldwide release during 2012. Four months after finishing third in the seventh series of British reality singing contest The X Factor in December 2010, One Direction began recording the album in Sweden, the UK, and the United States, working with a variety of writers and producers. The album's lyrical content regards being young, relationships, heartbreak and empowerment.
The album received generally favorable reviews from contemporary music critics, many of whom appreciated the album's combination of melodic song craft and catchy, pop-oriented material that, while slickly produced, avoided the commercial cynicism and adult contemporary posturing of some of their '80s and '90s forebears. The album bowed at number two on the UK Albums Chart and ultimately became the UK's fastest-selling debut album of 2011. Up All Night debuted to number one on the United States Billboard 200, selling 176,000 copies in its first week. Up All Night was an international success, the album topped the charts in sixteen countries. According to the International Federation of the Phonographic Industry (IFPI), Up All Night was the third global best-selling album of 2012 with sales of 4.5 million copies worldwide.
 
One Direction finished 2012 with two of that year's top five best-selling albums in the United States; Up All Night at number three and their second studio album, Take Me Home, at number five, making the boy band the first act to place two albums in the year-end top five in the Nielsen SoundScan era. In addition, Up All Night became the best-selling album by a group and the third best-selling debut album of 2012. Four singles were released from the album, including the UK Singles Chart top ten hits "What Makes You Beautiful", "Gotta Be You", and "One Thing". To promote the album, the band performed on many TV shows and awards ceremonies, including the 2012 MTV Video Music Awards. Furthermore, One Direction embarked on their first headlining concert tour, the Up All Night Tour. Footage from this concert was recorded and released on a live album, entitled Up All Night: The Live Tour.
 
The album topped the charts in sixteen countries. Up All Night became the third best selling album of 2012 globally, selling 4.5 million copies. It entered the UK Albums Chart at number two on 27 November 2011, selling 138,631 copies, becoming the UK's fastest-selling debut album of 2011 and also the fastest selling album of 2011 to miss out on the top spot. The album was kept off the top spot by the first week sales of Rihanna's Talk That Talk, which sold 163,819 copies. The album became the sixteenth biggest-selling album in the UK of 2011, with 468,000 copies sold. As of 8 December 2012, the album had sold 777,000 copies in the UK. The record became the fifteenth best-selling album in the UK of 2012, with sales of 372,000 copies. It was certified tripled platinum by the British Phonographic Industry (BPI) on 22 July 2013, denoting shipments of 900,000 copies. As of November 2014, the album has sold 1,086,434 copies in the UK. The record held the runner-up position for four non-consecutive weeks on the Irish Albums Chart, and was the tenth biggest selling album in 2011 in Ireland. After six months in the Irish Albums Chart top twenty, the album peaked at number one in its twenty-seventh week. The album topped the Australian ARIA Chart for five consecutive weeks, and was certified quintuple platinum by the Australian Recording Industry Association (ARIA), denoting shipments of 350,000 units. In New Zealand, the album topped New Zealand Albums Chart for three non-consecutive weeks, and was certified triple platinum by Recording Industry Association of New Zealand (RIANZ), denoting shipments of 45,000 units.