Is it possible for any female to sing soprano?

[Padmini]

I really wanted to be a soprano and was very happy when my former and current voice teachers told me that I am by evaluating my voice.
I still want to know in general whether it is possible for any given female to become a soprano. Is it possible for her to naturally be an alto and work towards becoming a soprano? Or is the range that we naturally have set in stone. Another voice teacher told me that everyone will only ever be the range that he/she is born with and gave me an anecdote of one of her students who is a baritone and can sing till the cows come home, but will never be a tenor.
Please elaborate with details in your answer. Thanks!

[songofendlesswondder]

I think that if you work hard enough you probably could. When I was younger, I was only a soprano and I wasn't a very rangey soprano either. I didn't even really have a chest voice, but I worked really hard and my range now expands over alto, mezzo, and soprano, and I can sing soprano notes I never thought I would be singing a couple years ago. My advice is to sing every day, and try to push yourself as much as you can without damage. Also, find a really good vocal teacher. I had a great vocal teacher who heard my soprano and still felt like I had some belt in me. She worked me really hard, but it was worth it.

[Larcen26]

Consider yourself lucky. Most girls nowadays despise being a soprano. They desperately want to belt. (not saying a soprano can't belt, but you know what I am saying)

Working hard will expand your range, but my analogy has always been this...

Your voice type is like your sexual orientation. You may desperately want to change it, but once you accept what you are, you will be much happier.