The Ancient One is a fictional character from the Marvel Comics universe, primarily associated with the Doctor Strange series. This character is depicted as a powerful sorcerer and the former Sorcerer Supreme, responsible for training Doctor Strange in the mystic arts. The Ancient One possesses vast knowledge of magic and the multiverse, often serving as a mentor to those who seek to protect Earth from supernatural threats. In the Marvel Cinematic Universe, the Ancient One is portrayed by actress Tilda Swinton in the film "Doctor Strange" (2016). This adaptation presents the character as a wise and enigmatic figure, guiding Doctor Strange on his journey to become a master of the mystic arts while confronting dark forces.