JLS (Jack the Lad Swing) is a British boy band that gained fame on The X Factor UK in 2008, finishing as runners-up to Alexandra Burke. The group consists of Aston Merrygold, Marvin Humes, JB Gill, and Oritsé Williams.

Their self-titled album (2009) included hits like Beat Again and Everybody in Love, both of which topped the UK Singles Chart. JLS became one of the UK's biggest boy bands, winning multiple BRIT and MOBO Awards. In 2013, they announced their split after a farewell tour. They reunited for their Beat Again Tour in 2021 and released new music, including their 2023 album 2.0.

JLS has continued touring and performing, and they remain a beloved act in the UK music scene.