He was ordinary consul in AD 63, with Lucius Verginius Rufus as his colleague.
[2][3] His grandfather, Publius Memmius Regulus, had married a woman from Ruscino, in the province of Gallia Narbonensis.
Although the year of his birth is uncertain, Regulus was born during the second half of the reign of the emperor Tiberius.
Regulus was appointed consul ordinarius in AD 63, during the reign of Nero.
[4][5] Regulus' father had died two years earlier, and did not live to see his son reach the pinnacle of his career.