A new reality competition show giving aspiring designers a chance to show their collections at some of the largest U.S. retailers debuts tonight with the premiere of Fashion Star.

Model Elle Macpherson, the show's host and executive producer, and celebrity mentors Jessica Simpson, Nicole Richie and John Varvatos anchor the show, which pits 14 wannabe designers against one another to vie for the attention of buyers at Macy's, H&M and Saks Fifth Avenue.

NBC says the show, airing tonight from 9:30-11 p.m. ET, aims to search for the next big brand in fashion. At the end of the competition, one designer will win $6 million in purchase orders for collections in the three stores.

Buyers for each retailer will serve as judges who will compete for the right to purchase and carry the work of the designers. If viewers see something they like, they won't have to wait long to get it -- the winning designs showcased each week will be online immediately and in stores the next day. The series was shot last year, allowing time for the clothes to be manufactured.

After tonight's premiere, the hourlong show will air in the 10 p.m. time slot.

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