'Now there arose a new king over Egypt, who did not know Joseph.
The reason many movies about Moses portray the Pharaoh as Ramesses is because of the Bible passage found in Exodus 1:8-11 which states: But according to the Bible, Ramesses could not have been the Pharaoh of the Exodus.
Demille's classic 'The Ten Commandments' starring Charlton Heston, Yul Brynner plays the role of Pharaoh Ramesses in one of the all-time great Bible movies about Moses.
Moses and Pharaoh are mentioned in history Moses and Pharaoh in History