Leonidas ( , died 9 August 480 BC) was a hero-king of Sparta, the 17th of the Agiad line, one of the sons of King Anaxandridas II of Sparta, who was believed in mythology to be a descendant of Heracles, possessing much of the latter's strength and bravery. He is notable for his leadership at the Battle of Thermopylae.
The fictional character, King Leonidas, has appeared in the following films and TV series: