The 1956 movie version of Nineteen Eighty-Four had an ending that was different than the book, because of pressure from the CIA.
The agency disregarded Orwell's specific instructions that the story not be altered. In the book, the protagonist, Winston Smith, is entirely defeated by the nightmarish totalitarian regime. In the very last line, Orwell writes of Winston, "He loved Big Brother." In the movie, Winston and his lover, Julia, are gunned down after Winston defiantly shouts: "Down with Big Brother!"