We always knew those One Direction boys were cheeky chappies but they may have gone too far this time!

Harry Styles and Louis Tomlinson are the two members of the band that have proved themselves to be pretty funny but X Factor winner, Matt Cardle probably didn't find their latest antics too amusing.

The troublesome duo gave out Matt's mobile phone number to over 7,000 fans over Twitcam last night!

The boys decided to prank call Matt but it went straight to answerphone and we all know what happens when you reach someone's answerphone. It reads out your number...

Bless them, the boys didn't realise what they'd done for a good few minutes. Check out the video here...

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