Juanito "Jun" Madarang Aristorenas (May 7, 1933 – April 25, 2000) was a Filipino actor, director, dancer, producer and writer.^[1][2] Aristorenas was known for his western roles, and had topbilled cowboy movies such as Sagupaan ng mga Patapon, Dugong Tigre, and Apat na Bagwis.^[3]

As an actor, Aristorenas has performed in movies such as Danilo Ronquillo: Cavite Boy, released in 1965, in which he portrayed Danilo Ronquillo, Rico Solitaryo (1966), and Bale-bale Kung Lumaban (1964). As a movie director, he has worked on movies such as Matalino man ang matsing na-iisahan din!, released in 2000, Cara y Cruz: Walang Sinasanto! (1996), and Marami Ka Pang Kakaining Bigas (1994).

Aristorenas has also written the story of "Matalino man ang matsing na-iisahan din!", released in 2000.^[1]

Aristorenas was married to Virginia Gaerlan (April 21, 1938 – March 8, 1989), a former actress. Their sons, Robin (born 1964), Junar (born 1968) are former child actors.