The couple announced their separation in May amid allegations the Boyzone star had an affair with dancer Francine Cornell, 26.
But they have since been snapped on a family day out together, suggesting they have rekindled their romance.
Now Ronan, 33, wants to make the reunion official by organising a wedding blessing in Ireland over the summer.
'Renewing their vows will show Yvonne, their family and friends just how much he loves her,' a source tells the Sunday People.
'He can't wait - Ronan feels it will be a new chapter in his life. He wants to start over.'
Ronan and Yvonne, 36, got married for the first time in the Caribbean 12 years ago.
They are parents to Jack, 11, Marie, 9, and Ali, 4.
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