"When I got fat, I was being stupid. It was a little bit like when I used to do drugs," Alley says in the Sept. 26 issue of People magazine. "Before I stopped doing drugs, I had to spiritually get a grip and go, 'What do you want your life to be like?'"
Alley, 54, said she weighed nearly 200 pounds before focusing on diet and exercise and now she's just 30 pounds from her goal weight, Zap2it.com reported.
Although she feels a lot better lighter, Alley says her loss girth could also mean a financial loss, since "Fat Actress" has yet to be renewed.
"I think (they) have great concerns about me not being fat," she said.
Alley told People she didn't face up to her weight problem until she saw herself on the Showtime program.
"I didn't realize I was that fat," she said. "Seriously."