Tyrannosaurus
Tyrannosaurus rex appears in many works of fiction and literature.  A T. rex is important in A Sound of Thunder by Ray Bradbury.  A T. rex is a big part of the novel Jurassic Park by Michael Crichton, and Steven Spielberg's crew built a life-sized robot T. rex and a CGI T. rex for the movie version of Jurassic Park. Many other T. rexes have appeared in books, movies and animated works.