[1] During the 1970s, she appeared in Mexican soap operas including Colorina (Goldfinch), with Mexican actress Lucía Méndez, El derecho de nacer (The Right to be Born), and El maleficio (The Curse), also taped and broadcast by Televisa.
By the end of the 1970s, Díaz was performing in leading roles in the telenovelas: La Jibarita (The Country Girl), taped in Dominican Republic, Modelos S.A. (Models S.A.) opposite Fernando Allende and Giselle Blondet, and Cuando Despierta un Amor (When a love arouses), opposite Braulio Castillo Jr., both taped in Puerto Rico.
Díaz has her own film production company called Copelar, with her actress partner Sonia Valentín.
She has starred in and produced several television movies, such as Sudor Amargo (Bitter Sweat) and Las Combatientes (The Combatants).
Díaz hosted the daily talk show Entre Nosotras (Among Us) with actresses Valentin and Noris Joffre, among other personalities.