The 2006 independent drama centered on Magdalena’s celebration is titled Quinceañera.
The film follows Magdalena as her family prepares for her 15th-birthday event. Its title directly names the tradition while the plot explores family relationships and personal conflicts surrounding the celebration.
Quinceañera was directed by Richard Glatzer and Wash Westmoreland and premiered at the Sundance Film Festival. It won both the Dramatic Grand Jury Prize and the Dramatic Audience Award there in 2006.
The title can be confused with the general name of the cultural event. In this question, Quinceañera is the title of a specific feature film, while lowercase or context-dependent use of quinceañera refers to the celebrant or celebration.