Scarlett Johansson Reveals The Secrets Behind Her Black Widow 'Iron Man 2' Body

Along with her work training, "Iron Man 2" director Jon Favreau credits Scarlett's ability to give up some of her favorite foods in making the Black Widow suit look so good.

"She was wearing an unforgiving costume," Jon said. "She didn't eat much, that's for sure. She likes food, as do I, and she was definitely on a low-carb diet and training very hard. It was amazing."

This is why actresses go off the deep in with the diet and exercise. Scarlett Johansson has her director Jon Favreau commending her for not eating to fit into a costume.

I personally believe any costume designer worth there talent could have designed a costume that fit the part as well as allowed for a healthy woman's body type.