Label: Domino – DNO 136
Format: Vinyl, LP, Album, Gatefold
Country: USA & Canada
Released: Apr 24, 2007
Genre: Rock
Style: Alternative Rock, Indie Rock

Favourite Worst Nightmare is the second studio album by English rock band Arctic Monkeys, released on 23 April 2007 by Domino Recording Company. Recorded in east London's Miloco Studios with producers James Ford and Mike Crossey, the album was preceded by the release of "Brianstorm" on 2 April 2007. This is the band's first album with bassist Nick O'Malley, replacing their previous bassist Andy Nicholson, who left the band before the North America tour of the band's debut studio album.

In comparison to the band's debut album Whatever People Say I Am, That's What I'm Not, the album is considered more ambitious, with ambient sounds and expanded drum rhythms being introduced. Like Arctic Monkey's debut, Favourite Worst Nightmare was a widespread critical success, with critics highlighting the band's new emotional depth and Turner's matured songwriting. NME and Uncut ranked it the second-best album of 2007, while Dutch publication OOR named it the best of 2007. In retrospect, the album is considered the start of the band's change of sound with each of their albums after their debut.

In its first week of release, the album sold over 227,000 copies, going straight to number one in the UK Albums Chart. "Brianstorm" and "Fluorescent Adolescent" were also both hits on the UK Singles Chart, with the former reaching number two on the chart. In the United States, the album debuted at number seven on the Billboard 200, selling around 44,000 copies in its first week. The album has since gone 3× platinum in the UK. It was nominated for the 2007 Mercury Prize and won Best British Album at the 2008 BRIT Awards.