Lindsay Lohan has hit out at rumours she is dating Adam Senn.

The 'Mean Girls' star - whose on/off relationship with Dj Samantha Ronson is believed to have ended - blasted recent speculation romantically linking her to the model and restaurant owner.

She wrote on her twitter page: "Such lies.

Two hours later the 23-year-old actress wrote: "I'm not cheating!"

A source had claimed that the pair had met when Lindsay was in New York for fashion week.

The insider added: "He thinks Lindsay is a fun girl. Adam is pretty up-and-coming, and Lindsay likes that.

"He's genuinely interested in her, and it seems pretty mutual."

Lindsay has also been linked to a number of different men in recent months, including Cash Warren and Jason Segal.

The actress and designer is currently filming a BBC documentary in India about human trafficking.

The source added: "Adam said he was looking forward to when she got back from India."