Egyptians were oppressed under Persian rule, welcomed Alexander the Great in 332 B.C.
Alexander the Great; when at the Oracle of Amon, at Siwa, was declared "the son of Amon." From that point on Alexander was the son of god. A pharaoh. (Amen also called: Amon, Amun, Ammon, Amoun."The Hidden One." was a self created and primary god)
Alexander started to build Alexandria, but left Egypt in 331 B.C. leaving Cleomenes of Naukratis in charge.
It was later claimed by Ptolemy.
When Alexander died, Ptolemy's generals divided the kingdom. Ptolemy had Egypt as his share.
During his long reign Ptolemy led Egypt to prosperity before he handed over its management to his son, Ptolemy II.
The Ptolemaic Dynasty was started.
Ptolemy, a Greek general was ancestor to Cleopatra.
For the most part; the Greeks did not mingle much with Egyptians. Many elements of Greek culture were introduced by the Ptolemaic Dynasty.
Ptolemaic Dynasty went on to Ptolemy Auletes.
Ptolemy XI king of Egypt, was the father of Cleopatra VII.
On her father's death in 51 BC Cleopatra, and her brother, Ptolemy XII, about 12 years, jointly succeeded to the throne of Egypt.