I am female...my age is18...i want to be an actress..is it possible?

Of course it is possible. You have the power to make every year your year! Just remember to stay strong and humble and to always work and go for your opportunities. Acting is a job that is really hard to get into and maintain, but if you can see that and still have a strong will to continue toward that path. Please do! I know you can do what you put your mind into. Pursue it with power!