Adaptation. (2002)

Screenwriter Charlie Kaufman is hired to adapt "The Orchid Thief," a nonfiction book by Susan Orlean about an eccentric orchid breeder, John Laroche, but he becomes completely blocked. Meanwhile, Charlie's happy-go-lucky twin brother, Donald, dashes off a potboiler thriller based on multiple personality disorder. As Charlie continues to struggle, we see Laroche and Orlean in flashbacks, but past and present converge, as Charlie "writes himself" into his screenplay, and he and Donald begin to collaborate.