If Elizabeth II features in your dream, this is a mother archetype, although the troubles of her family may have tainted this image. Diana, Princess of Wales has become a symbol of the wronged and martyred heroine, the maiden held captive by social constraints. [1]
Dreaming that you’re a member of royalty can represent feeling or desiring one of the qualities listed above.
Being with someone who is royal can mean: you’re curious about that person, you’d like to be in their social circle (or feel you deserve to be), your subconscious mind considers the real-life royal to be your acquaintance because of their familiarity from media appearances.
See also: Celebrity, Authority Figure [2]
The exception is if your dream had some embarrassing or unpleasant element in it, in which case it is a warning that you could be victimized by underhanded gossip, so keep your private affairs to yourself. [4]