The Fratellis are a Scottish rock band from Glasgow, formed in 2005. The band consists of three unrelated members, who perform under pseudonyms: lead vocalist and guitarist Jon Fratelli, bassist Barry Fratelli, and drummer Mince Fratelli. Their debut album, Costello Music (2006) was a success, peaking at number 2 on the UK Albums Chart and spending eighty-three weeks in the UK Top 100. In the United States, it peaked at forty-eight on the US Billboard 200.

The Fratellis won the 2007 BRIT Award for Best British Breakthrough Act, and as of March 2018, Costello Music had sold 1,145,000 copies in the UK. Costello Music spawned five successful singles – "Henrietta", "Chelsea Dagger", "Whistle for the Choir", "Baby Fratelli" and "Ole Black 'n' Blue Eyes". The singles "Chelsea Dagger" and "Whistle for the Choir" were both top ten hits in the UK charts. Following the success of Costello Music, the Fratellis released their second album, Here We Stand (2008), before entering a hiatus period.

The band returned in 2013 and released their third album We Need Medicine, debuting at number twenty-six on the UK Albums Chart, it was considered a disappointment and marked significant decline in popularity for the band. We Need Medicine dropped out of the UK Top 100 after just one week. The album peaked at number one hundred and six on the US Billboard 200.

Chart performances improved for the band with the release of their further releases, Eyes Wide, Tongue Tied (2015), In Your Own Sweet Time (2018) and Half Drunk Under a Full Moon (2021), all of which debuted within the top five in their native Scotland.