楼上的错误太多了,忍不住更正一下.
I want yo be a actor.I want to be a actress.
He is a famous actor.She is a famous actress.
This actor/actress is popular among the young people.
She is one of the best actresses in the world.He is one of the best actors in the world.
The leading actor in this film is very handsome.The leading actress in this film is very pretty/beautiful.