In 2010 five young lads decided to try their luck at The X Factor auditions – Harry Styles, Zayn Malik, Louis Tomlinson, Liam Payne and Niall Horan. Fate brought them together and One Direction was born. They would go on to become the most profitable boyband in history, topping charts and winning hearts all over the world.
Though the boys are not currently together, with a new official website launching on 23 July to mark their 10th anniversary, rumours are rife of a possible reunion tour. So with 10 years of One Direction to look back on - how well do you know them?
Are you still a 1D superfan, or have Little Things started to fade from your memory? Test your One Direction devotion with our quiz.