From losing Zayn to going on hiatus, many tears have been shed.
And perhaps the most emotional moment so far was when the band reunited last December backstage at the X Factor to support Louis' performance after his mother, Johannah passed away after a long battle with leukaemia.
But unfortunately for us mega 1D fans, we never actually got a glimpse of all four boys together... until now!
A three second video has surfaced that shows Liam giving Louis a big 'ol hug upon seeing him backstage with Niall and Harry standing close by.
OK, we feel personally attacked by that...
A 1D reunion may be a while off, but at least we have those three seconds of ~heaven~ to cherish until such day comes.