RatPac-Dune Entertainment or RatPac Entertainment, is an American motion picture financing company formed in a merger by producer-director Brett Ratner, his partner billionaire James Packer, and Dune Entertainment's Steven Mnuchin, which provides funds to a number of Warner Bros. films. The company is the result of a 2013 merger between RatPac Entertainment and Dune Entertainment, following a collapse in negotiations between Dune and 20th Century Fox – which led the company to close a deal with Warner Bros. instead, replacing Legendary Pictures as Warners' key co-financing partner. Dune had been co-financing Fox films since 2006.