Cameron Diaz takes a packed lunch everywhere.

The 'Gambit' actress likes to be in control of her diet so thinks it is an easy thing to make her own meals, even when she is out and about for the day.

She said: ''If I'm out for the day, running around taking care of errands, especially in Los Angeles, most of the time I show up with my own food.

''It's my body - I don't have to have somebody else make my choices for me. So I take it with me and I set up my life so I can do that.

''I've built it into my schedule so that I have food that I can just grab out of my refrigerator and pop into my cold pack and take it with me for the day.

''I'm a woman, I carry a purse so another bag isn't really a big deal.''

Cameron believes good nutrition is important - because she can then eat more.

She told Britain's ELLE magazine: ''It's about controlling something so you can have more.

''With good nutrition you actually get to eat more food because when you're eating empty calories, a massive plate of food that does nothing for you, all it does is feed sickness, heart disease, diabetes, obesity, high blood pressure, lethargy, issues with your digestive system...''