AnnaSophia Robb's best beauty secret is not to wash her hair every day.

The 19-year-old actress also lets her locks dry naturally and but says her top tip is not to be so rigorous about cleaning rituals.

She said: ''I try not to wash my hair every day - that's my real secret.

''And I never blow-dry it, I just let it air dry.

''I love Frederic Fekkai beach spray, which has salt in it to add waves.

''I love getting my nails done and I can't live without BareMinerals powder in my make-up bag.''

The 'Carrie Diaries' star also admitted she often wears workout clothes when she is relaxing - to help motive her into going to the gym.

She added: ''When I'm at home, I'm casual and comfortable - I usually wear workout clothes to convince myself to go to the gym.''

However, she also loves to dress up for special occasions.

She added: ''When I'm going out, I choose dresses and edge towards the bohemian side.

''And I love a good pair of heels, just like any girl. I need to give my feet a break.''