Darth Tyranus, also known as Count Dooku, is a fictional character in the Star Wars universe. He is a former Jedi Master who becomes a Sith Lord, serving as the apprentice to Darth Sidious. Dooku plays a significant role in the Clone Wars, leading the Separatist movement against the Galactic Republic. As a skilled lightsaber duelist and Force user, Darth Tyranus is known for his charisma and intelligence. He seeks to overthrow the Jedi Order and establish a new order under Sith control. His character is portrayed by Christopher Lee in the prequel trilogy of the Star Wars films.