Cleopatra was a member of the Ptolemaic dynasty, a family of Macedonian Greek origin that ruled Egypt after Alexander the Great's death during the Hellenistic period. The Ptolemies, throughout their dynasty, spoke Greek and refused to speak Egyptian which is the reason that Greek as well as Egyptian languages were used on official court documents such as the Rosetta Stone. By contrast, Cleopatra did learn to speak Egyptian and represented herself as the reincarnation of an Egyptian goddess, Isis.
As pharaoh, she consummated a liaison with Julius Caesar that solidified her grip on the throne. She later elevated her son with Caesar to co-ruler in name.