They were just teenagers when they were thrown together on The X Factor before going on to become one of the world's top selling boy bands.
And as One Direction, Harry Styles, Zayn Malik, Louis Tomlinson, Liam Payne and Niall Horan were seemingly inseparable.
With help from Simon Cowell, they harnessed the power of social media and and sparked a fan frenzy which is still alive and well to this day,
