The Altadena teen attends Polytechnic School in Pasadena and is active in equestrian events and community service.
She was crowned during an official ceremony at the First Church of the Nazarene of Pasadena. Her six princesses come from five different area schools.
"Rose Queen Ana Marie Acosta and the six Rose Princesses for 2014 are exceptional young women," said Tournament of Roses President Scott Jenkins in a statement. "The Royal Court members are symbols of hope for the future, and I know they will inspire many young girls during the next few months."
Acosta and her court will preside over the 125th Rose Parade and game on New Year's Day and appear at over a hundred events.