Fernando Manuel Alonso Gómez de Valdés y Castillo (21 January 1931 – 28 August 2020), better known as Manuel "El Loco" Valdés, was a Mexican actor and comedian. He was member of the Valdés family; brother of Ramón Valdés, who portrayed "Don Ramón" on the sitcom El Chavo, and Germán Valdés (a.k.a. "Tin Tan"). He was also the father of singers Cristian Castro and Marcos Valdés.
