Kirstie Alley is being sued over an alleged weight-loss product scam.

The former ‘Cheers’ actress claimed she had shed 100 pounds by using supplement Organic Liaison but now an angry dieter has claimed Kirstie and the product’s maker have engaged in “nothing more than a healthy deception” and her new figure was down to her appearance on ‘Dancing with the Stars’ in the early months of 2011.

Marina Abramyan filed a lawsuit at Los Angeles Superior Court on July 20, which claims Kirstie’s extreme weight loss was the “result of an above average exercise regime and extremely low calorie diet”.

She also claims that ‘DWTS’ “tracked [Alley's] weight loss as a result of hours and hours of dancing every day for several months”.

Abramyan alleges the supplement’s marketing campaign involving Kirstie violates Federal Trade Commission regulations and that she wrote to the company demanding they cease their deceptive practices.

However, the company wrote back to Abramyan, denying her claims and refusing to change their advertising practices, prompting her to file suit.

She is seeking an injunction preventing Organic Liaison from proceeding with its current campaign, which utilises before-and-after ‘DWTS’ photos of Kirstie, as well as unspecified damages for the “proposed plaintiff class”.

Representatives for Kirstie and Organic Liaison have not yet commented on the matter.