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Alba Nydia Díaz (born April 27, 1955) is a Puerto Rican actress who has worked in Puerto Rico and Mexico.

Díaz was born in Caguas, Puerto Rico. The roles she portrayed in her early days and years after were not leading roles, from Conciencia Culpable (Guilty Conscience), in 1969, through Cristina Bazán, in 1977.^[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 also performed on stage in Puerto Rico, including in La Pasión según Antígona Pérez (The Passion of Antígona Pérez), La Casa de Bernarda Alba (The House of Bernard Alba), La Carreta (The Oxcart), Zorba the Greek, Electra, Tiempo Muerto (Dead Season), and Frida Kahlo Viva la Vida.

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. It was broadcast by Televicentro in Puerto Rico and WAPA America, throughout the United States.

• Alba Nydia Díaz at IMDb