A groundbreaking movie about forbidden love between two cowboys in the American West, "Brokeback Mountain" by Taiwan-born director Ang Lee, has conquered critics at the 62nd Venice International Film Festival even before its world premiere. Featuring strong performances by Heath Ledger and Jake Gyllenhaal in the leading roles, the film is a sensitive study of the homosexual relationship between two cowboys who meet while working on a ranch in 1963. Agence France Presse reports.