We get Blake Lively hair envy, like, every day, and her latest 'do is no exception. If you’re looking for some Saturday-night hair, look no further because this mussed up side plait is perf. We asked ASOS hairstylist Charlotte Pannell for a step-by-step…

1. Rough-dry hair with heat protection spray to create a tousled texture. 

2. Randomly curl half the hair with a medium tong and really shake it out. 

3. Lightly spray the hair with hairspray to give hold and shine. 

4. Plait the hair really loosely to one side. Once tied, shake the plait around so you get lots of pieces to fall out, then pin to secure.

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