However, it was not to last long, as eventually, Malik left the band in 2015 after a difficult period.
Despite 1D having earned millions of followers and a number of hit songs, Malik chose to go solo with his own work, while the foursome carried on.
This was only until 2016, however, when the boys declared they were going on an indefinite hiatus, and each singer has now released solo material to differing levels of success.
Officially, there has been no confirmation or announcement to suggest there will be a reunion of any kind, though many of the members have taken to Twitter to share their feelings about the anniversary.
source: express.co.uk