Servilia was a Roman matron from a distinguished family, the Servilii Caepiones. She was the daughter of Quintus Servilius Caepio and Livia, thus the half-sister of Cato the Younger. She married Marcus Junius Brutus, they had a son, the Brutus who would assassinate Caesar. After her first husband's death in 77, she married Decimus Junius Silanus, and with him had a son and three daughters.
She gained fame as the mistress of Julius Caesar, whom her son Brutus and son-in-law Gaius Cassius Longinus, would assassinate in 44 BC. The relationship between Caesar and her seems to have been well known in Rome at the time. Plutarch stated that she in turn was madly in love with him. The relationship between the two probably started in 59, after the death of Servilia's second husband.