Avid Directioners celebrate landmark 5 year anniversary with #5YearsOfOneDirection
It has been just five years since One Direction were formed and yet it's impossible to remember a time before the five-turned-foursome existed.
Lest you forget, the fans have spent the day on Twitter reminding you that it's #5YearsOfOneDirection with an outpouring of emotion and admiration for Louis Tomlinson, Niall Horan, Harry Styles, and Liam Payne.
Even former bandmate Zayn Malik, who left the band in March to live a "normal life", is feeling the love.
Louis and Harry have both taken to Twitter to thank their management and particularly their fans with Harry tweeting, "To you who support us, in any way, thank you. We wouldn't be here without you. You did this and we thank you for having us. All the love".
Louis, meanwhile, returned to social media following a recent quiet period (following the announcement he would have a baby with "good friend" Briana Jungwirth). He wrote, "You have been by far the most incredible fanbase and nothing you do goes unnoticed . We are so lucky to have you guys ! Thanks so much :)"
Lest his sentiment was not understood, he continued with, "Thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you".
Even their mums got in on the act. Harry's mum Anne wrote, "For 5 of the most amazing years of your lives .. Continue to grow in who you are & what you do .. #5YearsofOneDirection @onedirection" while Louis' mum Johannah Deakin tweeted, "It's a special date today. 5 years ago today my boy said....... Mum! They have put me in a band. Thank you ..."
However, the fans have been a little more forthright with their feelings. Here are some of their reactions to #5YearsOfOneDirection...