Who created the character of Kilgore Trout?

Kilgore Trout is a fictional character created by author Kurt Vonnegut. In Vonnegut's work, Trout is a notably unsuccessful author of paperback science fiction novels.

Trout was inspired by author Theodore Sturgeon (Vonnegut's colleague in the genre of science fiction—Vonnegut was amused by the notion of a person with the name of a fish, Sturgeon, hence Trout), although Trout's consistent presence in Vonnegut's works has also led critics to view him as the author's own alter ego.

Trout appears in several of Vonnegut's books, but the character is deliberately inconsistent as Vonnegut habitually changes major details about his life and circumstances with each appearance. Trout is consistently presented as a prolific but unappreciated science-fiction writer; other details, including his general appearance, demeanor and his dates of birth and death, vary widely from novel to novel. (Perhaps the most extreme instance of this occurs in Jailbird, wherein "Kilgore Trout" is merely a pseudonym of Dr. Robert Fender, a novelist and prison inmate.) Vonnegut makes no attempt to reconcile these sometimes extreme differences, and his novels do not form an internally consistent world.