Kym Marsh has reportedly been dumped by her husband after she allegedly had an affair.

It has been claimed the 'Coronation Street' actress cheated on Jamie Lomas - who she married in September 2012 - with her co-star Oliver Mellor and it is said he is ''absolutely devastated''.

An insider told the Sunday Mirror newspaper: ''Kym has been having an affair since February and kept it a secret. Jamie found out a few days ago and is absolutely devastated.

''It was a bolt out of the blue. He doesn't think there is any opportunity for them to get back together. He's told her it's over.''

Jamie is apparently concerned for the effect the affair will have on their two-year-old daughter Polly and Kym's elder children David, 17, and 15-year-old Emily, from a previous relationship.

The source added: ''For Jamie the worst part is that it all started while he was away in America trying to get jobs and bring in more money for the family.

''He is really worried about the kids and how they are feeling. He's not in a good place. He is furious.

''He is no angel but he can't believe she kept it a secret for such a long time.''

Meanwhile, the 'EastEnders' actor seems to have demanded a showdown with Oliver after a tweet - which he later deleted - insisted they needed to talk.

He wrote: ''You need to come see me.''

A source told The Sun on Sunday newspaper: ''Jamie flipped out when he heard the news about Kym and Oliver.

''He hit the roof and said he wanted to get his hands on Oliver.''