When you dream when you're asleep, do those dreams (almost) always have people that you personally know?

Have you ever had a dream that had a celebrity, other recognizable being, or character that you didn’t personally know?

E.g., I once had a dream where I turned into Superboy and tried to attack Frankenstein’s monster.

Have you ever had a dream that had someone you didn’t know at all?

If your answer is yes to any of the above, what happened in some of those dreams?