In March 2005, Warner Bros. said that Joss Whedon would write and direct the movie version of "Wonder Woman." Because Whedon was directing "Serenity" at the time and needed time to learn Wonder Woman's background, he did not start writing until late 2005. Silver wanted to movie "Wonder Woman" in Australia once the script was finished. In May 2005, Whedon said that he would not cast Wonder Woman until he finished the script. Charisma Carpenter and Morena Baccarin said they were interested in the role.