Union J have confirmed they're back as a trio with Casey Johnson leaving the group.
His exit comes just a year after joining the former 2012 X Factor finalists, replacing George Shelley who left the group.
Casey had been a member of Stereo Kicks who themselves made The X Factor live shows back in 2014.
However almost twelve months, according to The Sun newspaper, Casey has been 'sacked' from his role in Union J after the group's new management felt he didn't fit their image.
It means that the remaining three - Josh Cuthbert, JJ Hamblett and Jaymi Hemsley - will continue on as a trio, as they were when originally auditioning for The X Factor in 2012 under the name Triple J.
A source told the newspaper: "Management just didn’t think Casey was right for the band. The realised this over the past few months. It was felt he could never really replace George and the band would be better off as a trio.”
The boys confirmed the news in a Facebook post, writing: "We are sad to announce that Casey is leaving Union J, in order to pursue other opportunities.
"It’s been a great year, having him onboard, but being in a band is like any other relationship and sometimes it just doesn't work out.
"Casey is an incredibly lovely, talented guy and a great friend to the band, so please go support him as well in his next venture and we wish him all the very best for the future.
"It feels now that the best way forward is to carry on as we originally started out…….as a three piece (Josh, Jaymi and JJ)
The boys added that they plan to release their third album in 2013.
Union J have so far released two albums with the latest - You Got It All - charting at Number 28 back in 2014.
Meanwhile, Casey tweeted: "I guess you have already seen that I am leaving Union J -had some great times but now the time is right to move on...
"Thanks to all the fans for all your brilliant support & hope you continue to follow me into a new chapter in my life, love you all ❤ - Casey"