Who plays Elena in The Vampire Diaries show?

At the beginning she is 16 years old.

I thought She Was 17 in the first Season, and in Season 2 She'll Be 18 Year's Old.

I know it was the second season and the episode was called "The last day."

I recall her saying to Stefan that she was only 17 and she wanted to grow up she also tells Stefan she doesn't want to be a vampire and that she never wanted to be one I hope that helped some