Shrek is a 2001 American computer-animated fantasy comedy film loosely based on the 1990 book of the same name by William Steig, produced by DreamWorks Animation and released by DreamWorks Pictures. It is the first installment in the Shrek franchise. The film was directed by Andrew Adamson and Vicky Jenson (in their feature directorial debuts) from a screenplay written by Joe Stillman, Roger S. H. Schulman, and the writing team of Ted Elliott and Terry Rossio. It stars the voices of Mike Myers, Eddie Murphy, Cameron Diaz, and John Lithgow. In the film, the ogre Shrek (Myers) finds his swamp overrun by fairy tale creatures banished by Lord Farquaad (Lithgow). With the help of Donkey (Murphy), Shrek agrees to rescue Princess Fiona (Diaz) for Farquaad to regain his swamp.