Prior to 2003, colleagues James Wan and Leigh Whannell had begun writing a script based for a horror film, citing inspiration from their dreams and fears. Upon completing the script, Leigh and James had wanted to select an excerpt from their script, later to be known as "Saw", and film it to pitch their film to studios. With the help of Charlie Clouser, who had composed the score for the film, and a few stand-in actors, Leigh and James shot the film with relatively no budget. Leigh had decided to star in the film as well.