Brokeback Mountain actress Michelle Williams has been disowned by her former school because of her role in the controversial gay cowboy romance. Williams, who attended exclusive Santa Fe Christian School in San Diego, California, has been blasted by the school's headmaster as "offensive" for acting the long-suffering wife of a homosexual ranch hand, played by Heath Ledger. JIM HOPSON has branded the Oscar nominee a poor role model, and hopes his education establishment won't be linked to the film's themes. He tells the San Diego Union Tribune, "We don't want to have anything to do with her in relation to that movie. "Michelle doesn't represent the values of this institution. Brokeback Mountain basically promotes a lifestyle we don't promote."