Seyfried's Weight WorriesAmanda Seyfried constantly worries about her weight – because she fears piling on the pounds will cost her movie roles.

The 24 year old admits she’s not naturally thin and has to work hard to maintain her super-slender frame.

And she is always aware that if she lets her body get bigger, her career may suffer – because Hollywood bosses want to cast thin actresses in lead roles.

She tells Britain’s Glamour magazine, “If I didn’t run and work out, there’s no way I would be this thin. But I have to stay in shape because I’m an actress. It’s f**ked up and it’s twisted, but I wouldn’t get the roles otherwise. If I’d been a bit bigger, I don’t think they would have cast me for Mamma Mia!”

Seyfried has been using a raw food diet.

A typical lunch would consist of spinach and seeds. Spinach is a rich source of minerals and vitamins. Edible seeds include beans, cereals and nuts.

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