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A 2007 American comedy-drama directed by Creator/MennoMeyjes starring Creator/JohnCusack as a writer who adopts a young boy (Creator/BobbyColeman) who thinks that he is from Mars.

The film also stars Creator/AmandaPeet, Creator/SophieOkonedo, Creator/OliverPlatt, Creator/JoanCusack, Creator/AnjelicaHuston, and Creator/RichardSchiff.

The movie was released on November 2, 2007.

!!Tropes for the film:
* AdaptationalSexuality: The character played by John Cusack was gay in the original 1994 book.
* DaydreamBeliever: The film has a dark spin on this; the eponymous kid is a a Daydream Believer as a coping mechanism for his social awkwardness. It chronicles his adoptive father's struggles with the son's delusion that he's really from Mars and his "real parents" will come pick him up any day now.
* DepartmentOfChildDisservices: Social Services seriously considers taking Dennis away from what is probably the first supportive adult influence he's had in his entire life. Their reasoning? He's taking more than a month or two to just ''get over'' his social awkwardness and the extraordinary coping methods he developed to deal with severe abuse and neglect.
* TheFilmOfTheBook: The movie is based on Creator/DavidGerrold's 1994 book of the same name.