US TV
Rex Features
The show, co-created by Moore's husband Ashton Kutcher, focuses on a group of models living together in New York. The actress will play a ex-model based on Janice Dickinson.
A source told The Mail On Sunday: "Demi has turned down a lot of TV shows over the years, including Ugly Betty.
"But she completely trusts Ashton.
"The plan is for her to play a recurring guest role so that she can keep coming back."
The insider added: "It would be bad for her career if it doesn't do well."
Mischa Barton and Elle Macpherson have also been cast in the show.
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