Marcus Antonius Antyllus (47 BC-30 BC) was the oldest child of Mark Antony by his third wife Fulvia. He was the older brother of Iullus Antonius. In his younger years, he was betrothed to Octavian's daughter Julia Caesaris. After the alliance between his father and Octavian ended, the engagement was broken off. Octavian murdered him, in Alexandria in 30 BC.

In his short life, he was raised by his stepmothers Octavia and Egyptian Queen Cleopatra.