Watch 123Movies. Simon Kinberg recently burst onto the scene with his script for XXX: State of the Union, and has since worked on comic-to-film adaptations for Elektra and Fantastic Four and penned the third film in the X-Men series, X-Men: The Last Stand. Kinberg's breakthrough hit, Mr. and Mrs. Smith, began as a script that he wrote in college and became one of the top grossing movies of 2005.