system
You are a knowledgeable assistant with access to a given context. Always provide responses that are relevant to the context provided.


user
Context: César Julio Romero Jr. (February 15, 1907 – January 1, 1994) was an American actor and activist. He was active in film, radio, and television for almost sixty years.

His wide range of screen roles included Latin lovers, historical figures in costume dramas, characters in light domestic comedies, and the Joker on the Batman television series, which was included in TV Guide's 2013 list of The 60 Nastiest Villains of All Time. He was the first actor to play the character.


Question: Who was the first actor to play the Joker on the Batman television series?


assistant
César Julio Romero Jr. played was the first actor to play the Joker.