Gisele Bundchen invented a second persona when she first started modelling.

The Brazilian beauty admits she was initially terrified when she entered the fashion industry so created another person who was confident enough to make it in that world.

She said: "I was in the fashion shows in Milan, I was 17, I was doing like 100 shows. People were asking, 'How does it feel to be the model of the moment?' It was hard for me to answer as myself. I barely spoke English. I thought, I have to give my best because they trust me with that. I invented this other person, and she could do everything. She wasn't afraid; she was able to be ballsy and risky and sexy or androgynous. She was bold. I had to believe in myself as this person that was strong, up-front, invincible, and positive, who knew what she was doing, even though I really didn't."

Gisele - who is now one of the world's most famous supermodels - says she's been careful to let only those close to her see her true personality.

The 29-year-old star - who gave birth to her first child, Benjamin, with husband Tom Brady last December - told America's Vogue magazine: "I've worked for 14 years, but I don't think anybody in the business really knows me, because there is that other person."