King Charles III, 76, was, in the words of one royal insider, "well on his way to only being remembered as the man who cheated on Princess Diana." With his marriage to Queen Camilla nearing the 20-year mark,

The monarch, 76, has been married to Queen Camilla since 2005 -- but their relationship timeline wasn't all that straightforward.

King Charles, Prince William, and Princess Kate might be in the same family, but the king sees his successors as rivals for his popularity with the public.

King Charles and Prince William are without doubt the spine upon which the current Royal Family rests. In time, William will take the throne after his father, and though it could be many, many years