She was an elder sister of the dictator Julius Caesar, and the maternal grandmother of Rome's first emperor Augustus.

It is not known if it was the elder or the younger of the dictator's sisters who gave evidence against Publius Clodius Pulcher when he was impeached for impiety in 61 BC.

Julia and her mother gave the legal courts a detailed account of the affair he had with Pompeia, Julius Caesar's wife.

[1] Julia married Marcus Atius Balbus, a praetor and commissioner who came from a senatorial family of plebeian status.

[2][3][4] The second daughter was the mother of Octavia Minor (fourth wife of triumvir Mark Antony) and of Rome’s first Emperor Augustus.