Is it possible to make a floaty white dress look as laid back as boyfriend jeans? Take one look at Aussie actress Isabel Lucas at InStyle's 'Summer Soiree' in LA last night, and you'll see the answer is quite clearly, yes. 

The loose, flowing fit helps with this, but the thing giving this outfit a real dressing down is her beanie, which fully de-cutes her pixie-crop too. 

A tip to keep in mind when the autumn chill comes in, for sure.