One Direction were formed during the audition stages of The X Factor in 2010

Harry Styles now has a dazzling Hollywood grin.

The One Direction hottie has been having his teeth whitened in New York because a gleaming white smile is a must-have in the US for TV appearances.

But Harry, 18, doesn't look his best with his mouth full of dental apparatus - and band mates Louis Tomlinson, 20, Zayn Malik, 19, Niall Horan, 18, and Liam Payne, 18, are all bound to tease him about wearing a paper apron to get his film star new look. 

'If there are ever any embarrassing pictures of one of us...that's always worth a few days of mickey taking,' the teenager told Teen Now before flying off to the States.

'Or we all like to take pictures of each other when we're not looking or asleep - there have been some good ones, let me tell you!'

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