Vipsanius Clemens[a] (died 16 AD) was an impostor in Ancient Rome who attempted to impersonate the Roman emperor Augustus' grandson Postumus Agrippa (Marcus Vipsanius Agrippa Postumus).
Clemens appeared claiming that he really was Postumus and gained a significant band of followers but was captured and executed by Tiberius.
He went to Gaul and won many to his cause there and many later in Italy, and finally he marched upon Rome with the avowed intention of recovering the dominion of his grandfather.
The population of the city became excited at this, and not a few joined his cause; but Tiberius got him into his hands by a ruse with the aid of some persons who pretended to sympathize with this upstart.
[8] Ralf Scharf states in his work Agrippa Postumus: Splitter einer historischen Figur that "Clemens" is simply too common a name for there to be any certain connection.