Kirstie Alley: I've lost 100 pounds

Kirstie Alley walks the runway at the Zang Toi Spring 2012 fashion show during Mercedes-Benz Fashion Week at The Studio at Lincoln Center on Sept. 13, 2011, in New York.

/ Getty

(CBS) Kirstie Alley has seriously slimmed down.

The actress, whose weight has fluctuated in recent years, says she has lost 100 pounds and is now a size 6.

Pictures: Kirstie Alley on the runway

Pictures: Kirstie Alley
Pictures: Stars who lost weight on "DWTS"

Alley showed off her new figure in a photo spread for People magazine, and at New York Fashion Week, where she walked the runway in designer Zang Toi's show.

Alley told the magazine that she hit a wall two years ago, when her weight was around 230 pounds. She credits the weight loss to her daily dancing regimen on "Dancing with the Stars" last season, along with an organic diet and following Organic Liaison, her own weight-loss program.

"I feel back to normal," she said. "I have my game again."

On Twitter, Alley cleared up rumors that she went under the knife to reach her new figure.

"Thank u for all your SWEET comments.," she tweeted to fans about the People photos. "NO surgery, NO flippin lasers, NO barfing, NO starving...Jeez ...my products, organic food, dance."

10 Photos

Kirstie Alley at Fashion Week