Earlier reports had suggested that the couple were on the brink of splitting, following a reported 'hotel punch-up' on New Year's Eve.
However, the Mean Girls star took to her MySpace page to assure fans that her relationship with DJ Ronson was still strong.
Under the headline "Rumours" she wrote: "Little piece of true information: we did not break up!Get your stories straight please. It's really annoying to have all of your friends emailing you saying I saw, I read etc..."
This is not the first time Lohan has used her blog to deny a rift with Ronson. Last month she posted a statement denying rumours that the pair were going through a rough patch.