A franchise is the word given to multiple versions of a business model. In the entertainment industry, a franchise is different movies that share the same world, or are part of the same series. Famous franchises include the Harry Potter series, which includes ten films and spin off films set in the same wizarding world of magic, but with different plots and characters. Harry Potter is one of the biggest and most successful franchises in the world. It began as a book series, but now the franchise also includes theatre productions, toys and games.