In Kirstie Alley’s advert for QVC’s Organic Liaison, the actress is shown before and after her extreme weight loss.

In her advert, Kirstie Alley, 61, credits shredding pounds to the product.

However, a Californian woman has claimed that Kirstie Alley is a “liar”, and didn’t drop a staggering 100 lbs with the aid of the so-called weight loss tablets, and is now suing the star.

Marina Abramyan, who uses the product, claims that Kirstie Alley lost all of her weight when she was on Dancing With The Stars, according to the class action suit obtained by website TMZ.

The woman attributes Kirstie Alley’s slimline figure to vigorous dancing on the show and her low calorie diet.

She also alleges that Organic Liaison merely contains calcium and fibre, both of which are not proven weight-loss aids.

Marina Abramyan is suing for unspecified damages.

In Kirstie Alley’s advert for QVC's Organic Liaison, the actress is shown before and after her extreme weight loss

Kirstie Alley, who was born in Kansas, got her big break in the 1990’s on the hit comedy Cheers.

After the series ended, Kirstie Alley embarked on a movie career, but the roles later dried up when her weight spiraled out of control.

She served as a Jenny Craig spokeswoman from 2005 to 2008, however, she failed to reach her weight loss goals.

When Kirstie Alley appeared on DWTS last year, she began to shed weight rapidly and by the end of the series there was a vast difference in her figure.

Meanwhile Kirstie Alley recently wrote a memoir titled The Art of Men (I Prefer Mine Al Dente).

The tome is billed as a “candid and audacious memoir about her life and the men she has shared it with”.

The book’s Amazon entry also says it “delivers a down-and-dirty account of all the men she’s slept with, danced with, drank with, and the ones she’s loved and hated during her sixty years on the planet”.

Kirstie Alley, a high-profile Scientologist, will no doubt enjoy the notoriety she will garner from her tell-all book when it is released in November.

The book is also going to examine her weight battles, her successful spell on Dancing With the Stars and her journey into the world of science fiction geekdom when she starred in the Star Trek movie franchise.

Perhaps most exciting off all will be Kirstie Alley’s thoughts on starring in Cheers, which is one the most successful sitcoms ever in US TV history.