A quinceañera is traditionally crowned with a tiara during her celebration.
The tiara presents the celebrant as a young woman reaching an important milestone. In many modern celebrations, a parent, godparent, or another honored relative places it on her head during the formal ceremony.
The crown is symbolic rather than legally or religiously required. Families may choose a tiara, crown, or jeweled headpiece that matches the dress and theme. This tradition should not be confused with the separate presentation of other symbolic gifts, such as a Bible, rosary, or ring.
Customs vary widely by country, family, and denomination. Some celebrations emphasize a church ceremony, while others focus mainly on the reception and its music, dancing, and speeches.