10 years ago Liam, Harry, Louis, Zayn and Niall auditioned for the X Factor UK as solo acts - Simon Cowell put them together as a group and One Direction was born!
To celebrate their 10 year anniversary, the boys have shared a heartfelt video to YouTube showing their musical journey.
To celebrate the milestone the band has also launched a special '10 Years of 1D' website for fans. Some of the guys even took to Twitter to give a personal thanks to those who have helped them on the way...
Happy anniversary 1D - who knows what the next 10 years will hold in store for these guys!