Union J could have another line up change with Casey Johnson reportedly leaving the group.
His supposed 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.
Speaking last May when he first joined the group, Casey said: "I have always wanted to be in a band, not a choir. What I was in before wasn't like a boyband. Stereo Kicks was more of a choir."
He added: "Union J were always a much bigger band than Stereo Kicks. These guys are more mature and I feel already that this is the type of music I want to do."
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.”
Union J have so far released two albums with the latest - You Got It All - charting at Number 28 back in 2014.