KIRSTIE ALLEY’s weight explodes again as she indulges her favorite coping mecha­nism – food!

With a book deadline hanging over her head, the 61-year-old former “Cheers” star has ballooned back up to 200 pounds, sources say, and she’s facing deadly new health risks.

The Emmy winner unsuccessfully tried to hide her weight gain by wrapping her bloated body in a floor-length floral dress at the recent Book Expo America event in New York City while promoting her upcoming memoir.

“Kirstie’s under a lot of pressure to get her book done, so she’s been holed up at her homes in Florida and Kansas over the last few months writing,” a source told The ENQUIRER.

“Her weight seems to fluctuate with her moods. Based on her appear­ance in New York, she’s clearly gorging on food again and has hit 200 pounds.

“She’s trying to hide her bloated body in big, loose dresses, but she’s not fooling anyone.”

The “FAT ACTRESS” star – who’s notorious for her weight woes – claimed she lost 75 pounds while she was a spokesperson for the Jenny Craig weight loss program.

It didn’t last long, and she ballooned back up to her heaviest weight, which she claimed was 230 pounds. But in­siders say Kirstie’s weight is typically much higher than she admits, and some believe the 5-foot-8 actress actually tipped the scales at over 300 pounds at her heaviest.

Now sources say she’s  overeating again to handle the stress of penning her memoir, “The Art of Men (I Prefer Mine Al Dente),” due  in No­vember from Simon and Schuster.

With her weight climb­ing, Kirstie faces deadly new health consequences, experts say.

“Kirstie’s yo-yo dieting is extremely dangerous to her health. It puts strain on her heart, may lead to diabetes and places undue stress on her joints,”

New York City weight-loss expert Dr. Craig Title, who has not treated Kirstie, told The ENQUIRER.

Dr. Gabe Mirkin, a Flor­ida-based sport medicine specialist and author of “The Healthy Heart Mira­cle,” added: “Kirstie Alley is overweight and has a his­tory of yo-yo dieting which puts even more strain on the heart. She’s at an increased risk of a heart attack.”