Mouret, who is famous for his cutting and drape techniques, was the man behind the eponymous Galaxy dress that was a worldwide sell-out.
The collaboration features Mouret's aesthetic of figure flattering shapes using Banana Republic's signature Sloane stretch fabric on dresses, trousers, skirts and accessories that will be available in store from August 7th.
Key pieces include a leopard panel pencil skirt, navy panel v-neckdress and black asymmetric hourglass dress.
Prices range from 59 to 99 pounds. In the run-up to the launch one look will be available online each day.
Images: Roland Mouret for Banana Republic