In 1947, she signed a contract with CBS in New York to star in the radio serial: Aventuras de una niña, which was broadcast in all Central and South America, and produced by Carlos Montalbán.

During the mid-1950s, she played all the female roles in Panzón Panseco's radio sketches, along with Pedro Vargas, and Juan García Esquivel's orchestra (1957): "Ahora es la hora".

[citation needed] To promote her movie La Hija del Payaso (1946), in which she performed along with trained elephants and dogs, Muñoz learned to play the marimba and the xylophone.

She appeared as a guest star on episodes of various American television shows, including Columbo and I Spy, as well as live performances in the Million Dollar Theatre in Los Angeles, California.

[citation needed] In 2008, Muñoz played a role in Televisa's soap opera Cuidado con el ángel that was broadcast all around the globe and appeared in the 2011 season of Sesame Street – Mexico.

[citation needed] For her countless contributions to the Television, Theater and Motion Picture industries, Muñoz' handprints have been embedded onto the Paseo de las Luminarias in Mexico City.