A spokesperson for the Coronation Street actress confirmed it was a mutual decision, adding: "They decided to go their separate ways."
Kym has now removed all traces of Dan from her Twitter account, swapping her profile picture from an image of them together to a picture of her children.
She also deleted a line in her Twitter bio about having the world's best fiancé.
Dan, meanwhile, has done the same, changing his Twitter image from a red carpet picture of the couple to just one of himself. He also removed references to his fiancée from his bio.
The couple were engaged at Christmas. But last month, it emerged they were taking a break from their relationship.
At the time, Kym said: "We are both going through a really difficult time and it's tough obviously because there is that media spotlight but we've had a lot of support from our family and friends and that's been invaluable to us both.
"I think our priorities are our children, we're both kind of focusing on our kids and work at the moment. It is difficult, particularly when people feel that they know exactly what's going on, when actually they know nothing."
Dan had said: ""Nothing's broken off. We are having space and a break. False headlines. Please leave us alone with the horrible comments."
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