Happy anniversary to One Direction! It's hard to believe but today the band is celebrating four years together.
Liam Payne took to his Twitter today to thank all of 1D's fans for their constant support.
Niall Horan also tweeted about the group's four-year anniversary.
Horan continued to thank of all of the fans for "all over the world" for the incredible support. He also said he wants to just keep having more fun with Directioners.
Horan than thanked 1D themselves.
One Direction was first formed on the British singing-competition The X Factor and found international success after the show.
Harry Styles also got emotional thanking everyone who made it possible for the band.
1D is currently on a short break from their Where We Are tour before kicking if off again in August.