Biffy Clyro are a Scottish rock band that formed in Kilmarnock, East Ayrshire, composed of Simon Neil (lead vocals, guitar) and twin brothers James (bass, backing vocals) and Ben Johnston (drums, backing vocals). Currently signed to 14th Floor Records, they have released nine studio albums, and following their first three albums, the band expanded their following significantly in 2007 with the release of their fourth album Puzzle, which peaked at No. 2 on the UK Albums Chart and was awarded a Platinum certification by the BPI.

Their fifth album, Only Revolutions (2009) reached number three in the United Kingdom, and went Gold within days of its release before achieving double-platinum status in August 2011. The album also received a Mercury Music Prize nomination. Only Revolutions included the UK hit singles "Mountains", "That Golden Rule", and "Many of Horror", all of which reached the UK Top Ten. The latter reached No. 8 on the UK Singles Chart after The X Factor 2010 winner, Matt Cardle covered the song, and became the UK number one Christmas single for the year 2010. In 2011, the band was nominated for the Brit Awards for Best British Group. At the 2013 NME Awards, they received the award for Best British Band. On 25 August 2013 Biffy Clyro headlined the main stage at Reading and Leeds Festival. Their sixth studio album, the double album Opposites was released in 2013, and was their first album to reach number one in the United Kingdom, and their second to reach number one in Scotland.

It is estimated the band have sold in excess of 1,240,000 albums and 400,000 singles in the UK alone. As of 2021, in total, the band have spent 165 weeks in the top seventy-five of the UK Album Charts, with three of those weeks being at the top position at number one and 76 weeks within the main top forty of the albums charts. The band's singles have spent a total of 79 weeks in the UK Singles Charts, with six weeks in the top ten and 42 in the top forty.