Margarita Isabel was born in Mexico city and attended the Instituto de Bellas Artes. She started working in films in the 1970s, and has won a number of prestigious awards, beginning with the Diosa de Plata for Las apariencias engañan (for which she also received an Ariel nomination), and the following Arieles: Best Supporting Actress for Como agua para chocolate, Best Female Co-Star for Dos crímenes (she also won a Diosa de Plata for this role), and Best Supporting Actress for Mujeres insumisas. In addition, she was nominated as Best Supporting Actress for Chido Guan - Tacos de oro. Her son is actor Mario Ivan Martínez, who himself won the Best Actor Ariel for Como agua para chocolate and was nominated as Best Supporting Actor for Sucesos distantes.
Biographical Dictionary of Mexican Film Performers. EdwART. 2012.