Annia Galeria Faustina Minor (Minor Latin for the younger), Faustina Minor or Faustina the Younger (February 16 between AD 125 and 130-175) was a daughter of Roman Emperor Antoninus Pius and Roman Empress Faustina the Elder. She was a Roman Empress and wife to her maternal cousin Roman Emperor Marcus Aurelius. She was the namesake of her mother. Faustina from her parents' marriage was the youngest and the fourth child, second daughter and the only one who survived to adulthood from her siblings. She was born and raised in Rome.
Her great uncle Roman Emperor Hadrian had arranged with her father for Faustina to marry Lucius Verus. On February 25 138, she was engaged to Lucius Verus. Verus’ father was Hadrian’s first adopted son and intended successor for the emperor’s throne. However when Verus’ father died, Hadrian adopted Faustina’s father as his second adopted son and eventually, he became Hadrian’s successor.