Published Sunday, 01 April 2012
The Boyzone star previously separated from his partner, Yvonne, the mother of his three children, in 2010 amid allegations he enjoyed a fling with a dancer on tour in 2009.
The break lasted several months before they decided to give their relationship another try, but The Sun now reports the couple has split once again.
A source tells the publication: "Although Ronan and Yvonne couldn't patch things up, they are both determined to be there for their kids. They still love each other and wanted to tell their children and then their friends first, before everyone found out."
The singer's sister-in-law Valerie Keating refused to comment on the report, adding: "Family business is completely private."