This is a practical exegesis covering the development of a feature-length film script called Arnwood. It is a commercially developed adaptation of the classic novel, The Children of the New Forest (Marryat, 1993) using a Hollywood Three Act Structure (Thomas, 2010) and archetypal character development (Vogler, 1998). Fictional characters have been placed into an historical context highlighting events of the First English Civil War from 1647 to 1649. Dialogue, style and plot have been developed in a twenty-first century style to maximize audience appeal. Through the exegesis I explore the script and character development and discuss the implications of film adaptations and the importance of casting considerations.