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Her Royal Highness or His Royal Highness.
Highness is a lower rank of a Royal Highnessbecause a Highness may be a distant relative of the monarch whereas the a Royal Highness may be a sister, brother, son, daughter etc.
The duration of Your Highness is 1.7 hours.
Your Highness was created on 2011-04-08.
Your Highness was released on 04/08/2011.