Kirstie Alley Vows Rebound From Extreme Weight Gain

Former Jenny Craig spokeswoman Kirstie Alley may want to get back on that horse. The actress recently put on, oh 10-20 pounds ... give or take 60-70.

When the star - who won an Emmy Award during her seven-year stint on Cheers, but is perhaps better known for her extreme weight gains and losses that followed - stepped on a scale for the first time in 15 months, it wasn't pretty.

"I started screaming," Alley tells People in its new cover story. "It said 228, which is my highest weight ever. I was much more disgusting than I thought!"

But looking back, Kirstie Alley, 58, is hardly shocked.

During her three-year stint as the face (and body) of Jenny Craig, she trimmed down to an impressive 145 lbs. after losing, and keeping off, 75 lbs.

But since parting ways with the company she was so closely tied to in 2007, she had not worked out and banished her gym equipment to the garage.

Obviously.

This celebrity's diet or small, low-calorie portions gave way to Chinese takeout and pasta drenched with butter. "I fell off the horse," she says.

Today, Alley says she is primed to hire a trainer, toss the butter and sign up for a triathlon in order to whittle her "schlumpy" figure back down.

"I'm going to have to work harder than last time," says Allie after candidly admitting she went all Jessica Simpson on us, "but I'm way excited."