There are basically four problems to solve in order to produce realistic animated synthetic actors with hair: hair modeling and creation, hair motion, collision detection and hair rendering. The authors describe a complete methodology to solve these basic four problems. They present how hair styles may be designed with a Hair Styler module. They survey the animation model and emphasize a method of collision processing. Finally, they explain how hair may be rendered using an extension of a standard ray-tracing program. Applications of synthetic actors with various hair styles and different styles of mustaches and beards are shown