By Sarah Griffiths The eyes may be the window to the soul, but a smile can reveal more about a person than first thought. A body language expert has told MailOnline the tiniest tweak to a smile can change how a person is perceived - from looking up to appear flirtatious, to lowering the eyebrows to look more dominant and powerful, for example. Dr Peter Collett has pinpointed six types of smiles from the genuine ‘Duchenne’, where the corners of the mouth are pulled up and the muscles around the eyes contract, to the knowing, wry smile. Secret smiles: A body language expert has revealed the tiniest tweak to a smile can change how someone is perceived - from looking up to appear flirtatious (as seen on Miranda Kerr pictured left) to lowering the brows to look more powerful, which could help you get ahead at work (stock image pictured right)
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A body language expert from Oxford has pinpointed six types of smiles
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These include flirty, submissive, honest, secretive and dominant
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Dr Collett said keeping your eyebrows level while smiling makes you seem more powerful, while raising them suggests submissiveness
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The ‘look-up’ smile can be used to appear seductive and flirtatious
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It is also thought to be contagious because it mimics laughter
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Study has found that 67 per cent of women worry about their smiles and both sexes think it's the most attractive feature in a partner
A full smile is called a Duchenne smile - after 19th century anatomist @placeholder, who produced a ground-breaking study of the muscles involved in facial expressions of emotion.