* ¿Quién es tu actor favorito? - "Who is your favorite actor?"
* ¿Cuál es tu actor favorito? - "What is your favorite actor?"
* ¿Te gusta este actor? - "Do you like this actor?"
The translation of "Es tu actor" would be:
* "He/She/It is your actor" (but this doesn't make much sense in English).
Could you please clarify what you're trying to express?