Livia Drusilla (Classical Latin: LIVIA•DRVSILLA, LIVIA•AVGVSTA) (30 January 58 BC– 28 September AD 29), also known as Julia Augusta after her formal adoption into the Julian family in AD 14, was the wife of the Roman emperor Augustus throughout his reign, as well as his adviser. She was the mother of the emperor Tiberius, paternal grandmother of the emperor Claudius, paternal great-grandmother of the emperor Caligula, and maternal great-great-grandmother of the emperor Nero.