Kate and William's Daughter To Be Queen?
As current law stands, if William and Kate's first child is a daughter but their second is a son, the boy would inherit the throne.
Cameron is hoping to change this and other ancient rules in order to bring the monarchy up to date. He has already written the governments in the Commonwealth of countries with Queen Elizabeth, 85, as their monarch. The rule change would have to be ratified by all of them.
"We espouse gender equality in all other aspects of life, and it is an anomaly that in the rules relating to the highest public officer we continue to enshrine male superiority," Cameron wrote.
He also proposes lifting the ban on anyone marrying a Catholic succeeding to the throne, and is reportedly suggesting that only the first six in line to the throne need to get permission from the reigning monarch to wed.
The Palace had no formal comment.