Screenwriters Jason Reitman and Sheldon Turner never met, nor did they know of each other during writing the screenplay. When the novel was released in 2001, Turner read it, and wrote a speculative script adaptation, which he sold to DreamWorks in 2003. However, Reitman also discovered the book, and persuaded his father Ivan to acquire the film rights. Ivan Reitman then commissioned a screenplay by writers Ted Griffin and Nicholas Griffin, who used some elements from Turner's speculative script. Finally, Jason Reitman developed his own screenplay, by using some elements from the Griffin script, that (unbeknownst to Reitman) originated with Turner. Reitman initially claimed a single screenplay credit for himself, but the WGA ruled that he should share his credit with Turner, as certain elements of his speculative script remained in the film.

Film

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