I don't remember having any kind of stage fright ever. But this maybe because of the fact that my parents always encouraged me for public speaking. At a very young age I was picked to sing in my church choir which played a major role in developing my confidence. after this I was also enrolled in a personality development class where we had to give presentations and manage groups of kids our age. This was at the tender age of around 11- 12 years. So I think all of this has made me pretty confident.
I was a very shy person too back then.. but when I was in college, I realized that if I never try to stand up for myself -- I will never make my dreams happen. So when my professors asked me to do the alumni speech on our graduation, I did it.
That definitely changed my life.. Although since it was my first time, I also made a lot of mistakes in my speech LOL but still.. I learned from it and got over my shyness.