The singer and actor confirmed that his marriage to the mother of his 3-year-old child has come to an end after four years.
[Gareth Gates with wife Suzanne Mole]
He explained that the couple have decided to part ways after struggling to make the relationship work over the past few years.
"Despite our efforts over the past three years to make our marriage work, sadly Suzanne and I have decided to separate," he told The Mirror.
"Whilst we have grown apart, we love and cherish our wonderful daughter Missy and together we will prioritise her happy upbringing."
The split has occurred two weeks after it was alleged that Gates had had an affair with Legally Blonde co-star Faye Brooks.
Mole was said to have "hit the roof" after Gates was photographed entering Brooks's apartment in Wimbledon.
[Gates with Legally Blonde co-star Faye Brooks]
Gates was also accused of cheating on his wife with Les Misérables co-star Katie Hall in 2010.
A friend of the couple said: "Things have never been right since Gareth was first accused of playing around, but they wanted to give things a real go for Missy's sake.
"They tried their best but it was very strained at times and this latest incident was the final straw.
"They have been together for ten years and it really is very sad but there was just no way back."
Gareth Gates recently said that he is like the lead character from EL James's record-breaking erotic best seller Fifty Shades of Grey in bed.