Public, second actor's ego is made up of those who witness the event through dramatic (emotional, intellectual) participation.
An audience is a formal meeting that takes place between a head of state and another person at the invitation of the head of state. Often the invitation follows a request for a meeting from the other person. Though sometimes used in republics to describe meetings with presidents, the term Audience is more usually associated with monarchs and popes.
An audience is a group of people who participate in an experience or encounter a work of art, literature, theatre, music or academics in any medium. Audience members participate in different ways in different kinds of art; some events invite overt audience participation (see pb theatre and dance company) and others allowing only modest clapping and criticism and reception.