To dream of an actor represents an aspect of yourself that is pretending. Negatively an actor may reflect deceptive interactions with others. Posing, posturing, or not being yourself. Putting on a fake persona.
If the actor is a known celebrity then they symbolizes a quality or aspect of your personality based on your most honest feelings or thoughts about them.
Example: A man dreamed of being an actor. In waking life he was trying his hardest to lie to customer about his qualifications by pretending he was more experienced than he was.
Example 2: A man dreamed of seeing a girl who became a famous actress on a tv show. In waking life he was imagining what it would be like to be rich and date someone beautiful he knew after he received a large inheritance. He was imagining how he would live and behave with his money and beautiful wife.