Shrek 2 is a 2004 American animated fantasy comedy film loosely based on the 1990 children's picture book Shrek! by William Steig. Directed by Andrew Adamson, Kelly Asbury, and Conrad Vernon from a screenplay by Adamson, Joe Stillman, and the writing team of J. David Stem and David N. Weiss, it is the sequel to Shrek (2001) and the second installment in the Shrek film series. The film stars Mike Myers, Eddie Murphy and Cameron Diaz, who reprise their respective voice roles of Shrek, Donkey, and Princess Fiona. They are joined by new characters voiced by Antonio Banderas, Julie Andrews, John Cleese, Rupert Everett, and Jennifer Saunders. Shrek 2 takes place following the events of the first film, with Shrek and Donkey meeting Fiona's parents as the zealous Fairy Godmother, who wants Fiona to marry her son Prince Charming, plots to destroy Shrek and Fiona's marriage. Shrek and Donkey team up with a sword-wielding cat named Puss in Boots to foil her plans.

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.