The X Factor boyband have signed to Sony Music subsidiary RCA, with their debut single scheduled for June.
"We are absolutely thrilled to be signed to RCA. Being on X Factor was such a great experience and the perfect way for us to start our musical journey," Union J said.
"Hopefully 2013 will an amazing year for us and we cannot wait for everyone to hear our music."
The four-piece join JLS, Alexandra Burke and Aiden Grimshaw on the label's roster.
X Factor runner-up Jahmene Douglas also confirmed that he has signed a deal with RCA last week.
Meanwhile, Ella Henderson recently revealed that she has signed to Simon Cowell's Syco label, and will be working with Emeli Sande on new music.
Watch Union J chat to Digital Spy below: