Thalía played Beatriz in the 1987 Mexican telenovela Quinceañera.
The role came early in Thalía’s acting career, before she became one of the most internationally recognized Latin pop singers. Her appearance in the series is part of the television work that preceded her major music success and later starring roles in telenovelas.
Quinceañera also starred Adela Noriega as Maricruz Fernández, so the two performers are closely linked to the production. That pairing is one reason the series remains notable in discussions of Mexican popular culture and the careers of its young cast.
The answer is Thalía, whose name is commonly written with an accent on the second syllable. She is sometimes identified simply by her first name, but the actress and singer is the same person who later recorded internationally successful Spanish-language albums.