Exodus Film Group founder and CEO John D Eraklis and president Max Howard are producing the story of a pack of crayons who save their land from a tyrant.
Ferguson will voice the king's sidekick Gnat, Perez will portray the fiery crayon Red and Hall will voice the level-headed crayon Blue. As previously announced, Ricci will play the timid crayon Yellow.
Exodus has signed a multi-book deal with Simon & Schuster Children's Publishing to create a publishing programme to accompany the film, set to reach theatres by 2010.
Exodus' pipeline includes Bunyan & Babe starring John Goodman and Kelsey Grammer.