Thalía played Beatriz alongside Adela Noriega in the 1987 Mexican telenovela Quinceañera.
The series paired Thalía and Noriega as its two central young performers. Thalía’s role as Beatriz helped establish her early television profile before her later international career as a pop singer and actress.
The telenovela was produced by Televisa and became a recognizable title in Mexican popular culture. Its story focused on adolescent relationships and social pressures, using the quinceañera milestone as part of its cultural setting and title identity.
Thalía is sometimes confused with other Mexican entertainers because she later became internationally famous through music. In this question, the relevant identification is her acting role in the 1987 series, not her discography or another television appearance.