Alba Nydia Díaz was born in Caguas, Puerto Rico. Although 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, starring Johanna Rosaly, she always managed to impress in her performances, Díaz has always portrayed her "character" roles, as if she were the person in reality, in every interpretation.
During the 1970s, among the several soap operas she carried out in Mexico, was, Colorina, (Goldfinch), with Mexican actress: Lucía Méndez, and not less important performances in 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, she started 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, & Giselle Blondet, and Cuando Despierta un Amor, (When a love arouses), opposite Braulio Castillo, hijo, both taped in Puerto Rico.
Alba Nydia has also performed on-stage in Puerto Rico: 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 Kalo, among many others.
Alba Nydia, has her own film production company called "Copelar", with her actress partner: Sonia Valentín, and she's starred & produced several television movies, such as: Sudor Amargo, (Bitter Sweat) & Las Combatientes, (The Combatants).
Furthermore, Alba Nydia Díaz, is hosting a daily talk show: Entre Nosotras, (Among Us), with Puerto Rican actress Sonia Valentin and the Irish-Puerto Rican actress Noris Joffre, among other personalities, broadcast by Televicentro in Puerto Rico & WAPA America, throughout the United States.2004: Las combatientes (TV movie) Noemi
2003: Bitter Sweat
2003: Psicosis (TV series) Irene
2003: Plaza vacante
1999: Cuando despierta el amor (Soap Opera)
1998: Flores de la noche (TV movie) Mryriam
1995: Al son del amor (TV series)
1995: Señora Tentacion (TV series) Azabache
1993: A Flight of Hope
1989: La conciencia de Lucía (TV series) Ingrid
1985: Tanairi (TV series) Altagracia (1985)
1983: El maleficio (TV series) Sara
1981: El Derecho de Nacer (TV series) Virginia
1980: El ídolo (TV series) Alana
1980: La otra mujer (TV series) Susana
1980: Al final del arco iris (TV series) Adriana
1980: Colorina (TV series) Liza
1978: Cristina Bazán (TV series) Taina
1973: Adios, New York, adios