Shrek is a 2001 American animated fantasy comedy film loosely based on the 1990 children's picture book of the same name by William Steig. Directed by Andrew Adamson and Vicky Jenson and written by Ted Elliott, Terry Rossio, Joe Stillman, and Roger S. H. Schulman, it is the first installment in the Shrek film series. The film stars Mike Myers, Eddie Murphy, Cameron Diaz, and John Lithgow. In the film, an embittered ogre named Shrek (Myers) finds his home in the swamp overrun by fairy tale creatures banished by the obsessive ruler Lord Farquaad (Lithgow). With the help of Donkey (Murphy), Shrek makes a pact with Farquaad to rescue Princess Fiona (Diaz) in exchange for regaining control of his swamp.

Shrek! is a fantasy comedy picture book published in 1990. Written and illustrated by American book writer and cartoonist William Steig, it is about a repugnant green monster who leaves home to see the world and ends up marrying an ugly princess. The book was generally well received upon publication, with critics praising the illustrations, originality, and writing. Critics have also described Shrek as an antihero and noted the book's themes of satisfaction and self-esteem. The book served as the basis for the first Shrek film.