Mariachi is a musical ensemble traditionally associated with many Mexican quinceañeras.
Mariachi is a Mexican ensemble tradition featuring instruments such as violins, trumpets, guitars, vihuela, and guitarrón. Families may hire a mariachi group to perform during the reception, for the honoree’s entrance, or during a family tribute.
Mariachi is especially connected with Mexican celebrations, but it is not required for every quinceañera. Other families use a DJ, a live band, recorded music, or regional ensembles that reflect their own heritage.
The presence of mariachi also does not define the entire musical program. A celebration may include a formal waltz, popular dance music, and songs selected by the honoree. The answer refers to a common Mexican association, not a universal rule for every quinceañera worldwide.