Malick, best known for her role on 1990s sitcom Just Shoot Me!, has optioned Deanne Stillman's book Mustang: The Saga of the Wild Horse in the American West and will use the tome to detail Johnston's crusade, which earned her the nickname Wild Horse Annie.
The actress will produce the film along with writer Stillman and Helen Bartlett, while Jenny Wingfield has been appointed to adapt the script, reports the New York Post.
