Fans and judges were in agreement at the Sundance Film Festival as Push , starring an unknown actress from Harlem and featuring Mariah Carey in a supporting role, won both the Grand Jury prize for U.S. dramatic films and the top Audience Prize. The lead character in Push, played by Gabourney "Gabby" Sidibe, is a 16-year-old obese girl named Precious Jones, who is raped by her father and beaten by her mother, yet manages to escape from that environment. It is based on a best-selling novel by a former adult educator in Harem who writes under the name Sapphire. In the World Cinema competition, the top prize went to the Chilean film La Nan ( The Maid ), directed by Sebastián Silva.