Diane highlighted her tiny figure in a pale blue dress which nipped in at the waist before flaring out

Slender: Diane highlighted her tiny figure in a pale blue dress which nipped in at the waist before flaring out

She told Britain's Hello! magazine: 'I do watch what I eat, but not for weight reasons. It will sound really pretentious, but when I am really busy I forget to eat.
'I feel like I am a little skinny right now because I have just finished a movie and have been flying lots. I try to avoid all processed foods, too.'
The 35-year-old actress also added that she prefers to tone up the natural way, and stays in shape by exercising outdoors rather than doing dance classes or gym workouts.