One fan tweeted: "He couldn't deal with Harry's jokes anymore," while others speculated he ran off to join 5 Seconds of Summer. Check out some of our favorite reasons why Niall left One Direction. Meanwhile, we'll wait and see what he has to say about all the rumors and keep you updated on his response.
UPDATE: Both Sugarscape and Yahoo Celebrity UK's Twitter accounts were hacked last night, with both sites taking to Twitter to explain what happened. Sugarscape explained: "So while we were fast asleep, it turns out some d**khead hacked our account. VERY sorry for any heart attacks caused."
Yahoo Celebrity UK tweeted: "Morning everyone. Just so you know, Niall Horan isn't in fact leaving 1D, our account was hacked last night. We repeat, Niall isn't leaving."
Phew. Nialler isn't going anywhere.
He couldn't deal with Harry's jokes anymore #reasonsniallleftonedirection- Radio1D (@Radio1Direction) December 29, 2014
#reasonsniallleftonedirection he never wanted to be a pop star he wants to pursue his career as a water aerobics instructor- lottie 158 (@hypedniall) December 29, 2014
to focus on his golfing career #reasonsniallleftonedirection- ky (@toucaniall) December 29, 2014
The funny thing about this is, Niall probably don't even know HE left One Direction. #reasonsniallleftonedirection- Luke Hemmings (@NuriIsAPanda) December 29, 2014