Mariachi is a commonly hired musical ensemble at a Mexican quinceañera.
Mariachi music is strongly associated with Mexican cultural celebrations and may be performed during a reception, dinner, serenade, or special presentation. A mariachi group typically includes voices and string instruments such as violins, guitars, vihuelas, guitarrón, and often trumpets.
Not every quinceañera includes mariachi. Families may instead use a DJ, recorded music, a live band, regional musicians, or several of these options. The choice depends on location, budget, family heritage, and the style of celebration.
Mariachi is sometimes incorrectly treated as a single instrument. The term refers to a musical tradition and ensemble, not one specific instrument. It is also not exclusive to quinceañeras; mariachi is used for weddings, civic events, religious festivities, birthdays, and other celebrations.