Union J (originally Triple J) are a British boy band consisting of members Josh Cuthbert, JJ Hamblett, Jaymi Hensley and Casey Johnson. George Shelley was originally a member, but left in 2016, with Casey replacing him. However, Casey left the group in 2017. They were formed in 2011 and originally a trio, consisting of Cuthbert, Hamblett and Hensley then, Shelley was later added to the group in 2012 through the ninth series of British television music competition The X Factor, in which they finished fourth.