I wonder what happened to Pu Yi the last emperor of China, who ascended the throne at 3 years old but was totally controlled by his mother in law. The account given says he gave up the throne, fled the forbidden city and became an ordinary gardener. I dont know if he ever heard the gospel.
The Dalai Lama also was exiled from Tibet. Hes buddhist and seen as a spiritual leader, but I wonder what he thinks of the gospel to which he surely must know something about now.
The Queen of England grew up in the church of course but its seems only became born again or comitted via Billy Graham preaching, and so many presidents of the USA also had Billy Graham as their unofficial pastor.
Prince Charles of course comitted adultery as did his first wife, what a drama, but he confessed and was forgiven and continues to be dedicated to charity. He was quoted as saying he wanted to be defender of the faiths (plural). not defender of THE FAITH as would be his title if he ascends to the throne.
Prince William and Princess Kate seem to be grounded in their faith at least and havent shrunk from royal duties, although to many of us it seems royal duties just mean lots of photo ops.