![OK Logo](https://okmagazine.com/ok_logo_black_small.png)
Kirstie Alley's 100-Pound Weight Loss: All the Details!
![2011__09__OK040_brad pitt jennifer aniston sept20mb3 221×300.jpg](https://media.okmagazine.com/brand-img/324j7I0Pe/480x251/2011/09/2011__09__ok040_brad-pitt-jennifer-aniston-sept20mb3-221x300.jpg?position=top 480w, https://media.okmagazine.com/brand-img/324j7I0Pe/640x335/2011/09/2011__09__ok040_brad-pitt-jennifer-aniston-sept20mb3-221x300.jpg?position=top 640w, https://media.okmagazine.com/brand-img/324j7I0Pe/768x402/2011/09/2011__09__ok040_brad-pitt-jennifer-aniston-sept20mb3-221x300.jpg?position=top 768w, https://media.okmagazine.com/brand-img/324j7I0Pe/1024x536/2011/09/2011__09__ok040_brad-pitt-jennifer-aniston-sept20mb3-221x300.jpg?position=top 1024w, https://media.okmagazine.com/brand-img/324j7I0Pe/1280x670/2011/09/2011__09__ok040_brad-pitt-jennifer-aniston-sept20mb3-221x300.jpg?position=top 1280w, https://media.okmagazine.com/brand-img/324j7I0Pe/1440x753/2011/09/2011__09__ok040_brad-pitt-jennifer-aniston-sept20mb3-221x300.jpg?position=top 1440w, https://media.okmagazine.com/brand-img/324j7I0Pe/1600x837/2011/09/2011__09__ok040_brad-pitt-jennifer-aniston-sept20mb3-221x300.jpg?position=top 1600w, https://media.okmagazine.com/brand-img/324j7I0Pe/2160x1130/2011/09/2011__09__ok040_brad-pitt-jennifer-aniston-sept20mb3-221x300.jpg?position=top 2160w)
Sept. 25 2011, Published 4:00 a.m. ET
The striking blonde model strutting down the runway wearing Zang Toi stole the show at NYC's Lincoln Center when the cheering crowd realized the 5-foot-7-inch beauty was Kirstie Alley, who once tipped the scales at 230 pounds — and who is now 60 years old and a proud size 4! "It was so exhilarating," she told OK! exclusively about her runway experience. "I had the best time of my life!"
Before Dancing With the Stars, it had been a rocky road for Kirstie, who'd struggled with her weight through the years. But now she tells friends she's feeling better than ever.
"Kirstie says she's a new woman," a source tells OK! in this week's issue!
OK! NEWS: KIRSTIE ALLEY REVEALS "I'VE LOST 100 POUNDS"
"When she was heavy she was too embarrassed to go out. She hated herself and basically spent her time either with her kids or alone. In her own words, she was a hermit."
But Kirstie's time on DWTS really kicked off her newest weight loss.
"It revved up her metabolism and got her out of her shell," says the insider. "She realized just how much of life she was missing and she vowed to make a change."
OK! GALLERY: KIRSTIE ALLEY ROCKS THE RUNWAY AT NYC FASHION WEEK!
FOR MORE ON KIRSTIE'S WEIGHT LOSS, PICK UP THIS WEEK'S ISSUE OF OK! — ON SALE EVERYWHERE NOW!