Blue is the Warmest Color actress and French style queen Adèle Exarchopoulos nails looking sharp but not too polished and prissy, by teaming her lace Peter Pan collar (mismatched to perfection with a Breton top) with a not-even-trying messy topknot.

To achieve this look, use your fingers to mess up a bun after securing it with pins. Then spritz with hairspray to hold in place. Et voilà!

Find out more about Adèle and her cool French girl style here.