Jonathan Gems (born 1952, in London) is a British playwright and screenwriter mostly known for his work on Mars Attacks! (1996), directed by Tim Burton. He also wrote the film's novelization. His well known work includes a screenplay for an adaptation of George Orwell's novel 1984 and Mars Attacks Memoirs, a book of interviews about working with Tim Burton behind the scenes of Mars Attacks!. The son of the playwright Pam Gems, Gems wrote a number of plays for theatres on the London fringe before gradually turning to screenwriting. As well as Mars Attacks!
https://en.wikipedia.org/wiki/Jonathan_Gems