However, after studying the pictures again, it was clear they had not.
The actresses were spotted filming a skinny dipping scene from their new film 'Very Good Girls'.
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Elizabeth, 23, and Dakota, 18, were allowed to just about protect their modesty in skin coloured bikinis as they filmed the scene.
Despite wearing the unflattering two pieces, the girls still managed to look gorgeous, showing off their enviable flat stomachs.
Dakota seemed a little self conscious of the suit and by the looks of her face was non-to pleased about the temperature of the water.
Her Co-star, Elizabeth, younger sister of the Olsen twins Mary-Kate and Ashley, seemed more at ease and happily frolicked in the sea in between takes.
Also starring Demi Moore, 'Very Good Girls' focuses on two best friends who make a pact to loose their virginity during their first summer after High School.
Hmmm, that doesn't exactly sound like something good girls would do…