Her first telenovelas were Esmeralda, about a blind young woman, Mariana de la Noche (1975), about the forbidden love of Mariana Montenegro and Ignacio Lugo Navarro (José Bardina), María Teresa, a woman who goes insane after the loss of her little daughter, La Zulianita, Pecados Ajenos, and Cristal.

In 1985 she starred in a hugely successful telenovela produced in Venezuela by Radio Caracas Television named "Cristal" where she impersonates Victoria Ascanio, a very humble girl who after a brief forced encounter with a priest-to-be young man gets pregnant and is forced to leave her baby girl away after delivering her.

She hires a very beautiful girl who, after many plot devices applied, she discovers is her long lost daughter, whose estrangement make Victoria feel guilty and bittered.

In 2007, Ferrer participated in Telemundo's Pecados Ajenos, which has since become a cult classic, as the main villain, the evil Agata Mercenario.

In 2012, Ferrer also acted a telenovela by the name "Rosa Diamante" (Precious Rose), playing the character Rosaura Sotomayor.