Happy anniversary One Direction! The British boy band celebrates three years as a group today.
It's hard to believe the guys have only been together for such a short period of time when you consider everything they've accomplished: They're about to release their third (!) album; they made a movie; they've toured the world and they have an unprecedented fan base.
And it's not just their careers that have prospered over time, they've also grown into handsome young men. To prove just how much they've changed in just three years, we found pictures of Harry, Niall, Zayn, Louis and Liam from when they first started as a group and compared them with recent snaps ... Actually, there is one thing that hasn't changed about One Direction: They've always had great hair.
Who do you think has changed the most? Vote in the poll and wish One Direction a happy anniversary in the comments!