Moss, who cut a 3 million pound deal with Topshop, is the latest celebrity hired by a retailer to help win an increasingly competitive battle for fashion-savvy mid-market shoppers.
The 46-year-old said: "There are more than half a million children here in the US who need to be adopted or need homes, so-called 'hard to adopt kids' because they're not babies and come from troubled backgrounds, so I think that's probably the way I'd go."