Some of these actresses or public personas who are very public about their disciplined diets, more power to them. I just don't see the point. I'm just not going to be one of those people photographed in a bikini where people are like, 'OMG, look at Amy!' I mean, it might be OMG, but not for the reasons I want.

Most of the time it's the parents who recognise me. They try to tell their kids, 'Look, it's Giselle,' and I say, 'No, no, no, don't ruin this for them,' because I'm usually standing there with my hair sideways and no make-up on. And the kid is saying, 'That is not Giselle. No way. That is some worn-out girl who really needs a bath.'

I have to say I've been lucky in that way in that I've been able to go from different films and different genres with different challenges.

In high school, I was so painfully self-aware that how I thought of myself was probably very different from what other people thought of me. I thought of myself as just painfully awkward and dorky. I had a lot of hair and was kind of weird. I sang a lot in the hallways.