A sex tape starring Kym Marsh has reportedly been put up for sale to the highest bidder.

Kym Marsh

Kym Marsh

The 40-year-old singer and actress is featured on camera performing a sex act on a man - believed to be her partner at the time - and Kym is reportedly terrified that the embarrassing footage will soon be made public.

A source said: "Kym had absolutely no idea any sex tape existed, let alone that it was in the hands of a person vile enough to attempt to cash in on it. This news has left her reeling."

In addition to the sex tape, the person trying to sell the video is also offering photographs of Kym naked and in revealing poses to the highest bidder.

Kym, who starred in the British pop group Hear'Say, is said to be paranoid about the video footage and the photographs being made available to the public.

An insider told The Sun on Sunday newspaper: "She is stunned that someone is willing to betray her. She feels furious, humiliated and very vulnerable.

"She can't believe that someone could sink so low. She can only assume this is an act of pure greed.

"Kym has done nothing wrong. She will do anything she can to stop these images being made public."

The mother-of-three has been married twice, to actors Jack Ryder and Jamie Lomas, and was engaged to Dan Hooper until last year.

However, the identity of the man in the video is not clear, and Kym's agent has declined to comment on the report.