Ronan Keating and his wife Yvonne have sparked speculation they have reunited.

The couple - who split in May amid allegations the Boyzone star had cheated on the former model - have been spotted holding hands in Sydney, Australia, accompanied by their children Jack, 11, Marie, nine, and five-year-old Ali.

As well as dining together, Ronan - who is currently a judge on Australian talent search show 'The X Factor' - and Yvonne were pictured riding a Harley Davidson motorcycle before the 33-year-old singer accompanied his estranged spouse to a local Tattoo parlour, holding her hand as she underwent an inking on her hip.

A spokesperson for the couple declined to comment on whether they had rekindled their romance.

However, friends of the pair recently admitted Yvonne's decision to spend time Down Under with her estranged spouse was an indicator of her desire to reunite with the singer.

A source said: "Their love is strong and Yvonne wanted to give it a second chance and decided to follow him to Australia.

"That time together has done them the world of good and Yvonne has been able to forgive him. It's what he thinks is best for the children."

Yvonne threw Ronan out of their £2.5 million marital home in Dublin, Ireland, after it emerged he'd been having a seven-month affair with 26-year-old backing dancer Francine Cornell in May.