Kirstie Alley slims down for Jenny Craig

Fat Actress star Kirstie Alley has signed a deal to appear in ads for the Jenny Craig weight-management programme.

Alley, who has said she wants to lose the weight that prompted her new Showtime series, will star in Jenny Craig's 2005 advertising campaign. The TV commercials will begin airing in the US on January 10.

"I had a great time getting fat and now I'm going to have an even greater time losing weight," Alley, 53, said.

Alley's goal is to lose more than 20kg.