Union J are JJ, Casey Johnson, Josh Cuthbert & Jaymi Hensley.
Jaymi, Josh and JJ auditioned for The X Factor as a three piece called Triple J and got through to Bootcamp. After Rough Copy left the show Louis asked them to come back to the competition for Judges Houses and he added 19 year-old George Shelley to the group. They then became Union J, saying After tremendous chart sucess, George decided to go solo and was replaced by Casey. The band are now back and better than ever before.