Cleopatra's lover was the Roman Mark Antony.
Cleopatra . After Caesar 's assassination in 44 BC , she aligned with Mark Antony in opposition to Caesar 's legal heir Gaius Julius Caesar Octavianus ( later known as Augustus ) . Marcus Antonius ( Latin : ; January 14 , August 1 , 30 BC ) , commonly known in English as Mark or Marc Antony , was a Roman politician and general who played a critical role in the transformation of the Roman Republic from an oligarchy into the autocratic Roman Empire .