While everything seems to be copasetic between Prince William and King Charles —the monarch's drama is primarily with his younger brother, Prince Andrew, and his other son, Prince Harry —the king and future king have a little healthy competition going.

King Charles is "delighted" with Princess Kate and Prince William despite their Carole Middleton move, a royal source has claimed. The Prince and Princess of Wales are understood to be joining the King and Queen for Christmas on the Sandringham Estate after a "brutal" year.

As the eldest son of the monarch, 76, and the late Princess Diana, it's no surprise that the Prince of Wales is gearing up to take over the reins as future king.